Index by author
A
Adam, G.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Adduru, V.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Ahn, S.H.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Albayram, M.S.
- PediatricsYou have accessFrequency, Extent, and Correlates of Superficial Siderosis and Ependymal Siderosis in Premature Infants with Germinal Matrix Hemorrhage: An SWI StudyM.S. Albayram, G. Smith, F. Tufan and M.D. WeissAmerican Journal of Neuroradiology February 2020, 41 (2) 331-337; DOI: https://doi.org/10.3174/ajnr.A6371
Alexander, M.D.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Allman, A.B.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Almekhlafi, M.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Amans, M.R.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Anderson, A.G.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Andre, J.B.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Asada, Y.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Asemani, D.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Azuma, M.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
B
Baik, S.K.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Bakhru, A.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Bardis, M.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Baum, S.A.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Behbahani, S.
- FELLOWS' JOURNAL CLUBSpineYou have accessRenal Excretion of Contrast on CT Myelography: A Specific Marker of CSF LeakS. Behbahani, J. Raseman, H. Orlowski, A. Sharma and R. EldayaAmerican Journal of Neuroradiology February 2020, 41 (2) 351-356; DOI: https://doi.org/10.3174/ajnr.A6393
The authors performed a retrospective review of postmyelographic CT scans from 49 consecutive patients seen between January 2009 and August 2018 with imaging and/or clinical findings related to intracranial hypotension. Each scan was evaluated by both a neuroradiology fellow and a board-certified neuroradiologist for the presence of contrast in the renal excretory system. A similar assessment was also performed on 90 consecutive control subjects who underwent CT myelography for alternative indications. Among the 49 patients with suspected CSF leak, 21 (43%) had an overt CSF leak on postmyelographic CT (group 1) and 28 (57%) did not (group 2). Overall, renal contrast was identified in 7/49 patients (14.3%): 5 (24%) patients in group 1, and 2 (7%) patients in group 2. Renal contrast was not seen in any of the 90 controls on postmyelographic CT. Renal contrast was exclusively seen in patients with a clinically or radiographically suspected CSF leak. Identification of this finding should prompt a second look for subtle myelographic contrast extravasation or an underlying CSF-venous fistula.
Bello, J.A.
- SpineYou have accessDifferentiation between Tuberculous and Pyogenic Spondylodiscitis: The Role of the Anterior Meningovertebral Ligament in Patients with Anterior Epidural AbscessS.B. Strauss, S.R. Gordon, J. Burns, J.A. Bello and S.E. SlaskyAmerican Journal of Neuroradiology February 2020, 41 (2) 364-368; DOI: https://doi.org/10.3174/ajnr.A6370
Benson, J.C.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Bevelacqua, J.J.
- LETTERYou have accessComments on “Prolonged Microgravity Affects Human Brain Structure and Function”J.J. Bevelacqua, J. Welsh and S.M.J. MortazaviAmerican Journal of Neuroradiology February 2020, 41 (2) E7; DOI: https://doi.org/10.3174/ajnr.A6387
Bhatia, K.D.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Blackham, K.A.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Bloomberg, J.J.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Bonneville, F.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Brandt, A.U.
- SpineOpen AccessConsiderations for Mean Upper Cervical Cord Area Implementation in a Longitudinal MRI Setting: Methods, Interrater Reliability, and MRI Quality ControlC. Chien, V. Juenger, M. Scheel, A.U. Brandt and F. PaulAmerican Journal of Neuroradiology February 2020, 41 (2) 343-350; DOI: https://doi.org/10.3174/ajnr.A6394
Brown, T.R.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Burns, J.
- SpineYou have accessDifferentiation between Tuberculous and Pyogenic Spondylodiscitis: The Role of the Anterior Meningovertebral Ligament in Patients with Anterior Epidural AbscessS.B. Strauss, S.R. Gordon, J. Burns, J.A. Bello and S.E. SlaskyAmerican Journal of Neuroradiology February 2020, 41 (2) 364-368; DOI: https://doi.org/10.3174/ajnr.A6370
C
Callen, A.L.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Carlson, M.L.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Ch'ang, J.C.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Chen, J.
- Clinical ReportYou have accessMacrocerebellum in Achondroplasia: A Further CNS Manifestation of FGFR3 Mutations?H.M. Pascoe, J.Y.-M. Yang, J. Chen, A.M. Fink and S. KumblaAmerican Journal of Neuroradiology February 2020, 41 (2) 338-342; DOI: https://doi.org/10.3174/ajnr.A6369
Chen, Y.A.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Chenevert, T.L.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Cheng, X.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Chien, C.
- SpineOpen AccessConsiderations for Mean Upper Cervical Cord Area Implementation in a Longitudinal MRI Setting: Methods, Interrater Reliability, and MRI Quality ControlC. Chien, V. Juenger, M. Scheel, A.U. Brandt and F. PaulAmerican Journal of Neuroradiology February 2020, 41 (2) 343-350; DOI: https://doi.org/10.3174/ajnr.A6394
Chow, D.S.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Cognard, C.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Cooke, D.L.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Corniola, M.
- LETTERYou have accessIntraoperative MR and Synthetic ImagingM.I. Vargas, B.M.A. Delattre, P. Vayssiere, M. Corniola and T. MelingAmerican Journal of Neuroradiology February 2020, 41 (2) E4-E6; DOI: https://doi.org/10.3174/ajnr.A6373
D
Dafotakis, M.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
Darcourt, J.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Davies, J.M.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Delattre, B.M.A.
- LETTERYou have accessIntraoperative MR and Synthetic ImagingM.I. Vargas, B.M.A. Delattre, P. Vayssiere, M. Corniola and T. MelingAmerican Journal of Neuroradiology February 2020, 41 (2) E4-E6; DOI: https://doi.org/10.3174/ajnr.A6373
Demchuk, A.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
Diehn, F.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Dimitrov, I.E.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Dowd, C.F.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
E
Eckert, M.A.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Edwards, A.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Eldaya, R.
- FELLOWS' JOURNAL CLUBSpineYou have accessRenal Excretion of Contrast on CT Myelography: A Specific Marker of CSF LeakS. Behbahani, J. Raseman, H. Orlowski, A. Sharma and R. EldayaAmerican Journal of Neuroradiology February 2020, 41 (2) 351-356; DOI: https://doi.org/10.3174/ajnr.A6393
The authors performed a retrospective review of postmyelographic CT scans from 49 consecutive patients seen between January 2009 and August 2018 with imaging and/or clinical findings related to intracranial hypotension. Each scan was evaluated by both a neuroradiology fellow and a board-certified neuroradiologist for the presence of contrast in the renal excretory system. A similar assessment was also performed on 90 consecutive control subjects who underwent CT myelography for alternative indications. Among the 49 patients with suspected CSF leak, 21 (43%) had an overt CSF leak on postmyelographic CT (group 1) and 28 (57%) did not (group 2). Overall, renal contrast was identified in 7/49 patients (14.3%): 5 (24%) patients in group 1, and 2 (7%) patients in group 2. Renal contrast was not seen in any of the 90 controls on postmyelographic CT. Renal contrast was exclusively seen in patients with a clinically or radiographically suspected CSF leak. Identification of this finding should prompt a second look for subtle myelographic contrast extravasation or an underlying CSF-venous fistula.
Emoto, T.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Enzaki, M.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Ertekin, E.
- Adult BrainYou have accessEffects of Susceptibility Artifacts on Perfusion MRI in Patients with Primary Brain Tumor: A Comparison of Arterial Spin-Labeling versus DSCH. Maral, E. Ertekin, Ö. Tunçyürek and Y. ÖzsunarAmerican Journal of Neuroradiology February 2020, 41 (2) 255-261; DOI: https://doi.org/10.3174/ajnr.A6384
Eugène, F.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Evain, S.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
F
Ferre, J.C.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Ferrier, M.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Fink, A.M.
- Clinical ReportYou have accessMacrocerebellum in Achondroplasia: A Further CNS Manifestation of FGFR3 Mutations?H.M. Pascoe, J.Y.-M. Yang, J. Chen, A.M. Fink and S. KumblaAmerican Journal of Neuroradiology February 2020, 41 (2) 338-342; DOI: https://doi.org/10.3174/ajnr.A6369
Fischer, U.
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Foss, M.M.
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Friel, H.T.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Fujii, K.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
G
Gajjar, A.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Gauvrit, J.Y.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
George, M.S.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Gordon, S.R.
- SpineYou have accessDifferentiation between Tuberculous and Pyogenic Spondylodiscitis: The Role of the Anterior Meningovertebral Ligament in Patients with Anterior Epidural AbscessS.B. Strauss, S.R. Gordon, J. Burns, J.A. Bello and S.E. SlaskyAmerican Journal of Neuroradiology February 2020, 41 (2) 364-368; DOI: https://doi.org/10.3174/ajnr.A6370
Goyal, M.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
Gramada, R.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Griessenauer, C.J.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Guerin, J.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Gupta, R.K.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
H
Halbach, V.V.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Han, C.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Hans, F.-J.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
Hauben, Manfred
- PerspectivesYou have accessPerspectivesManfred HaubenAmerican Journal of Neuroradiology February 2020, 41 (2) 191; DOI: https://doi.org/10.3174/ajnr.P0087
Heck, D.V.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Helguera, M.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Hess, C.P.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Hetts, S.W.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Hey, S.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Higashida, R.T.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Hill, M.D.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Hinckley, P.J.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Hirai, T.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Hoi, Y.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Hu, H.H.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Hwang, S.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
I
Ikeda, O.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Ikemura, A.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Inglesby, D.C.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Ionita, C.N.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Ishibashi, T.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
J
Jablawi, F.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
Juenger, V.
- SpineOpen AccessConsiderations for Mean Upper Cervical Cord Area Implementation in a Longitudinal MRI Setting: Methods, Interrater Reliability, and MRI Quality ControlC. Chien, V. Juenger, M. Scheel, A.U. Brandt and F. PaulAmerican Journal of Neuroradiology February 2020, 41 (2) 343-350; DOI: https://doi.org/10.3174/ajnr.A6394
Jung, R.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
K
Kan, I.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Kang, C.H.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Karis, J.P.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Kashani, N.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
Katada, K.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Kato, N.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Khant, Z.A.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Kidoh, M.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Knox, J.A.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Kodama, T.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Koonen, J.J.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Kortman, H.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Krings, T.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Kumbla, S.
- Clinical ReportYou have accessMacrocerebellum in Achondroplasia: A Further CNS Manifestation of FGFR3 Mutations?H.M. Pascoe, J.Y.-M. Yang, J. Chen, A.M. Fink and S. KumblaAmerican Journal of Neuroradiology February 2020, 41 (2) 338-342; DOI: https://doi.org/10.3174/ajnr.A6369
Kunst, M.M.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
L
Lane, J.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Larrue, V.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Lassalle, M.V.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Laviolle, B.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Le Bras, A.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Levy, E.I.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Li, G.-J.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Li, Y.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Li, Z.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Lichtenstein, M.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Lu, Q.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
M
Maekawa, K.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Makepeace, L.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Manjila, S.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Maral, H.
- Adult BrainYou have accessEffects of Susceptibility Artifacts on Perfusion MRI in Patients with Primary Brain Tumor: A Comparison of Arterial Spin-Labeling versus DSCH. Maral, E. Ertekin, Ö. Tunçyürek and Y. ÖzsunarAmerican Journal of Neuroradiology February 2020, 41 (2) 255-261; DOI: https://doi.org/10.3174/ajnr.A6384
Mathews, T.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
McCoy, D.B.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
Meling, T.
- LETTERYou have accessIntraoperative MR and Synthetic ImagingM.I. Vargas, B.M.A. Delattre, P. Vayssiere, M. Corniola and T. MelingAmerican Journal of Neuroradiology February 2020, 41 (2) E4-E6; DOI: https://doi.org/10.3174/ajnr.A6373
Meluchova, Z.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Menon, B.K.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
Michael, A.M.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Miller, J.H.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Mitrea, B.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Mokin, M.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Mortazavi, S.M.J.
- LETTERYou have accessComments on “Prolonged Microgravity Affects Human Brain Structure and Function”J.J. Bevelacqua, J. Welsh and S.M.J. MortazaviAmerican Journal of Neuroradiology February 2020, 41 (2) E7; DOI: https://doi.org/10.3174/ajnr.A6387
Mull, M.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
Murayama, K.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Murayama, Y.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Murph, D.C.
- InterventionalOpen AccessImpact of Aortic Arch Anatomy on Technical Performance and Clinical Outcomes in Patients with Acute Ischemic StrokeJ.A. Knox, M.D. Alexander, D.B. McCoy, D.C. Murph, P.J. Hinckley, J.C. Ch'ang, C.F. Dowd, V.V. Halbach, R.T. Higashida, M.R. Amans, S.W. Hetts and D.L. CookeAmerican Journal of Neuroradiology February 2020, 41 (2) 268-273; DOI: https://doi.org/10.3174/ajnr.A6422
N
Nagaraj, S.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Nagaraj, U.D.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Nagata, H.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Nagayama, Y.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Najm, M.
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
Nakahara, I.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Nakaura, T.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Nietert, P.J.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
O
Obara, M.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Oda, J.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Oda, S.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Ooi, M.B.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Orlowski, H.
- FELLOWS' JOURNAL CLUBSpineYou have accessRenal Excretion of Contrast on CT Myelography: A Specific Marker of CSF LeakS. Behbahani, J. Raseman, H. Orlowski, A. Sharma and R. EldayaAmerican Journal of Neuroradiology February 2020, 41 (2) 351-356; DOI: https://doi.org/10.3174/ajnr.A6393
The authors performed a retrospective review of postmyelographic CT scans from 49 consecutive patients seen between January 2009 and August 2018 with imaging and/or clinical findings related to intracranial hypotension. Each scan was evaluated by both a neuroradiology fellow and a board-certified neuroradiologist for the presence of contrast in the renal excretory system. A similar assessment was also performed on 90 consecutive control subjects who underwent CT myelography for alternative indications. Among the 49 patients with suspected CSF leak, 21 (43%) had an overt CSF leak on postmyelographic CT (group 1) and 28 (57%) did not (group 2). Overall, renal contrast was identified in 7/49 patients (14.3%): 5 (24%) patients in group 1, and 2 (7%) patients in group 2. Renal contrast was not seen in any of the 90 controls on postmyelographic CT. Renal contrast was exclusively seen in patients with a clinically or radiographically suspected CSF leak. Identification of this finding should prompt a second look for subtle myelographic contrast extravasation or an underlying CSF-venous fistula.
Ospel, J.M.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
Otani, K.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Özsunar, Y.
- Adult BrainYou have accessEffects of Susceptibility Artifacts on Perfusion MRI in Patients with Primary Brain Tumor: A Comparison of Arterial Spin-Labeling versus DSCH. Maral, E. Ertekin, Ö. Tunçyürek and Y. ÖzsunarAmerican Journal of Neuroradiology February 2020, 41 (2) 255-261; DOI: https://doi.org/10.3174/ajnr.A6384
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Pao, J.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Parat, B.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Park, K.P.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Park, M.G.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Pascoe, H.M.
- Clinical ReportYou have accessMacrocerebellum in Achondroplasia: A Further CNS Manifestation of FGFR3 Mutations?H.M. Pascoe, J.Y.-M. Yang, J. Chen, A.M. Fink and S. KumblaAmerican Journal of Neuroradiology February 2020, 41 (2) 338-342; DOI: https://doi.org/10.3174/ajnr.A6369
Passe, T.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Patay, Z.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Patsoura, S.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Paul, F.
- SpineOpen AccessConsiderations for Mean Upper Cervical Cord Area Implementation in a Longitudinal MRI Setting: Methods, Interrater Reliability, and MRI Quality ControlC. Chien, V. Juenger, M. Scheel, A.U. Brandt and F. PaulAmerican Journal of Neuroradiology February 2020, 41 (2) 343-350; DOI: https://doi.org/10.3174/ajnr.A6394
Pereira, V.M.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Pinho, M.C.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Pinter, N.K.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Pipe, J.G.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Podgorsak, A.R.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Pons-Kühnemann, J.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
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Qiao, P.-G.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Qiu, W.
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
R
Radovanovic, I.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Raoult, H.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Raseman, J.
- FELLOWS' JOURNAL CLUBSpineYou have accessRenal Excretion of Contrast on CT Myelography: A Specific Marker of CSF LeakS. Behbahani, J. Raseman, H. Orlowski, A. Sharma and R. EldayaAmerican Journal of Neuroradiology February 2020, 41 (2) 351-356; DOI: https://doi.org/10.3174/ajnr.A6393
The authors performed a retrospective review of postmyelographic CT scans from 49 consecutive patients seen between January 2009 and August 2018 with imaging and/or clinical findings related to intracranial hypotension. Each scan was evaluated by both a neuroradiology fellow and a board-certified neuroradiologist for the presence of contrast in the renal excretory system. A similar assessment was also performed on 90 consecutive control subjects who underwent CT myelography for alternative indications. Among the 49 patients with suspected CSF leak, 21 (43%) had an overt CSF leak on postmyelographic CT (group 1) and 28 (57%) did not (group 2). Overall, renal contrast was identified in 7/49 patients (14.3%): 5 (24%) patients in group 1, and 2 (7%) patients in group 2. Renal contrast was not seen in any of the 90 controls on postmyelographic CT. Renal contrast was exclusively seen in patients with a clinically or radiographically suspected CSF leak. Identification of this finding should prompt a second look for subtle myelographic contrast extravasation or an underlying CSF-venous fistula.
Rava, R.A.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Ray, A.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Richelle, H.R.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Roberts, D.R.
- LETTERYou have accessReply:D.R. Roberts, D. Asemani, P.J. Nietert, M.A. Eckert, D.C. Inglesby, J.J. Bloomberg, M.S. George and T.R. BrownAmerican Journal of Neuroradiology February 2020, 41 (2) E8; DOI: https://doi.org/10.3174/ajnr.A6400
Robison, R.K.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Roh, J.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Ronziere, T.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Roques, M.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Rousseau, C.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
S
Saha, I.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Sakabe, D.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Saposnik, G.
- InterventionalYou have accessEndovascular Treatment Decisions in Patients with M2 Segment MCA OcclusionsM. Almekhlafi, J.M. Ospel, G. Saposnik, N. Kashani, A. Demchuk, M.D. Hill, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 280-285; DOI: https://doi.org/10.3174/ajnr.A6397
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Sasao, A.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Scheel, M.
- SpineOpen AccessConsiderations for Mean Upper Cervical Cord Area Implementation in a Longitudinal MRI Setting: Methods, Interrater Reliability, and MRI Quality ControlC. Chien, V. Juenger, M. Scheel, A.U. Brandt and F. PaulAmerican Journal of Neuroradiology February 2020, 41 (2) 343-350; DOI: https://doi.org/10.3174/ajnr.A6394
Schubert, G.A.
- EDITOR'S CHOICESpineYou have accessLong-Term Outcome of Patients with Spinal Dural Arteriovenous Fistula: The Dilemma of Delayed DiagnosisF. Jablawi, G.A. Schubert, M. Dafotakis, J. Pons-Kühnemann, F.-J. Hans and M. MullAmerican Journal of Neuroradiology February 2020, 41 (2) 357-363; DOI: https://doi.org/10.3174/ajnr.A6372
Spinal dural arteriovenous fistulas (sdAVFs) usually become symptomatic in elderly men, who are affected 5 times more often than women. Symptoms caused by sdAVF comprise gait disturbances with or without paresis, sensory disturbances in the lower extremities, pain, and sphincter and erectile dysfunction. The authors retrospectively analyzed their medical data base for all patients treated for spinal dural arteriovenous fistula at their institution between 2006 and 2016. Patient age, neurologic status at the time of diagnosis, the duration of symptoms from onset to diagnosis, and follow-up information were evaluated. The extent of medullary T2WI hyperintensity, intramedullary contrast enhancement, and elongation of perimedullary veins on MR imaging at the time of diagnosis were additionally analyzed. Data for long-term outcome analysis were available in 40 patients with a mean follow-up of 52 months. The mean age at the time of diagnosis was 69 years (median, 71 years; range, 53-84 years) with a male predominance (80%). The mean duration of symptoms was 20 months. Spinal dural arteriovenous fistulas are characterized by inter-individually variable clinical presentations, which make a determination of specific predictors for long-term outcome more difficult. Fast and sufficient diagnosis might result in a better outcome after treatment. The diagnosis of spinal dural arteriovenous fistula remains markedly delayed, reflecting an ongoing lack of knowledge and awareness among treating physicians of this rare-but-serious disease.
Scoggins, M.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Senko, J.L.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Sharma, A.
- FELLOWS' JOURNAL CLUBSpineYou have accessRenal Excretion of Contrast on CT Myelography: A Specific Marker of CSF LeakS. Behbahani, J. Raseman, H. Orlowski, A. Sharma and R. EldayaAmerican Journal of Neuroradiology February 2020, 41 (2) 351-356; DOI: https://doi.org/10.3174/ajnr.A6393
The authors performed a retrospective review of postmyelographic CT scans from 49 consecutive patients seen between January 2009 and August 2018 with imaging and/or clinical findings related to intracranial hypotension. Each scan was evaluated by both a neuroradiology fellow and a board-certified neuroradiologist for the presence of contrast in the renal excretory system. A similar assessment was also performed on 90 consecutive control subjects who underwent CT myelography for alternative indications. Among the 49 patients with suspected CSF leak, 21 (43%) had an overt CSF leak on postmyelographic CT (group 1) and 28 (57%) did not (group 2). Overall, renal contrast was identified in 7/49 patients (14.3%): 5 (24%) patients in group 1, and 2 (7%) patients in group 2. Renal contrast was not seen in any of the 90 controls on postmyelographic CT. Renal contrast was exclusively seen in patients with a clinically or radiographically suspected CSF leak. Identification of this finding should prompt a second look for subtle myelographic contrast extravasation or an underlying CSF-venous fistula.
Shiraz Bhurwani, M.M.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Siddiqui, A.H.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Silvera, V.M.
- Head & NeckOpen AccessThe Forgotten Second Window: A Pictorial Review of Round Window PathologiesJ.C. Benson, F. Diehn, T. Passe, J. Guerin, V.M. Silvera, M.L. Carlson and J. LaneAmerican Journal of Neuroradiology February 2020, 41 (2) 192-199; DOI: https://doi.org/10.3174/ajnr.A6356
Singh, G.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Slasky, S.E.
- SpineYou have accessDifferentiation between Tuberculous and Pyogenic Spondylodiscitis: The Role of the Anterior Meningovertebral Ligament in Patients with Anterior Epidural AbscessS.B. Strauss, S.R. Gordon, J. Burns, J.A. Bello and S.E. SlaskyAmerican Journal of Neuroradiology February 2020, 41 (2) 364-368; DOI: https://doi.org/10.3174/ajnr.A6370
Small, J.E.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Smith, G.
- PediatricsYou have accessFrequency, Extent, and Correlates of Superficial Siderosis and Ependymal Siderosis in Premature Infants with Germinal Matrix Hemorrhage: An SWI StudyM.S. Albayram, G. Smith, F. Tufan and M.D. WeissAmerican Journal of Neuroradiology February 2020, 41 (2) 331-337; DOI: https://doi.org/10.3174/ajnr.A6371
Snyder, K.V.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Song, P.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Strauss, S.B.
- SpineYou have accessDifferentiation between Tuberculous and Pyogenic Spondylodiscitis: The Role of the Anterior Meningovertebral Ligament in Patients with Anterior Epidural AbscessS.B. Strauss, S.R. Gordon, J. Burns, J.A. Bello and S.E. SlaskyAmerican Journal of Neuroradiology February 2020, 41 (2) 364-368; DOI: https://doi.org/10.3174/ajnr.A6370
Sugrue, L.P.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Suzuki, S.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
T
Takeshima, H.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Tanoue, S.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Temkit, M.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Tinkle, C.L.
- PediatricsYou have accessMRI Patterns of Extrapontine Lesion Extension in Diffuse Intrinsic Pontine GliomasL. Makepeace, M. Scoggins, B. Mitrea, Y. Li, A. Edwards, C.L. Tinkle, S. Hwang, A. Gajjar and Z. PatayAmerican Journal of Neuroradiology February 2020, 41 (2) 323-330; DOI: https://doi.org/10.3174/ajnr.A6391
Tkach, J.A.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Togao, O.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Toyama, H.
- Adult BrainYou have accessVisualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CTK. Murayama, S. Suzuki, H. Nagata, J. Oda, I. Nakahara, K. Katada, K. Fujii and H. ToyamaAmerican Journal of Neuroradiology February 2020, 41 (2) 219-223; DOI: https://doi.org/10.3174/ajnr.A6377
Tufan, F.
- PediatricsYou have accessFrequency, Extent, and Correlates of Superficial Siderosis and Ependymal Siderosis in Premature Infants with Germinal Matrix Hemorrhage: An SWI StudyM.S. Albayram, G. Smith, F. Tufan and M.D. WeissAmerican Journal of Neuroradiology February 2020, 41 (2) 331-337; DOI: https://doi.org/10.3174/ajnr.A6371
Tunçyürek, Ö.
- Adult BrainYou have accessEffects of Susceptibility Artifacts on Perfusion MRI in Patients with Primary Brain Tumor: A Comparison of Arterial Spin-Labeling versus DSCH. Maral, E. Ertekin, Ö. Tunçyürek and Y. ÖzsunarAmerican Journal of Neuroradiology February 2020, 41 (2) 255-261; DOI: https://doi.org/10.3174/ajnr.A6384
U
Uetani, H.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
V
Vannier, S.
- InterventionalYou have accessDWI-Based Algorithm to Predict Disability in Patients Treated with Thrombectomy for Acute StrokeH. Raoult, M.V. Lassalle, B. Parat, C. Rousseau, F. Eugène, S. Vannier, S. Evain, A. Le Bras, T. Ronziere, J.C. Ferre, J.Y. Gauvrit and B. LaviolleAmerican Journal of Neuroradiology February 2020, 41 (2) 274-279; DOI: https://doi.org/10.3174/ajnr.A6379
Vargas, M.I.
- LETTERYou have accessIntraoperative MR and Synthetic ImagingM.I. Vargas, B.M.A. Delattre, P. Vayssiere, M. Corniola and T. MelingAmerican Journal of Neuroradiology February 2020, 41 (2) E4-E6; DOI: https://doi.org/10.3174/ajnr.A6373
Vayssiere, P.
- LETTERYou have accessIntraoperative MR and Synthetic ImagingM.I. Vargas, B.M.A. Delattre, P. Vayssiere, M. Corniola and T. MelingAmerican Journal of Neuroradiology February 2020, 41 (2) E4-E6; DOI: https://doi.org/10.3174/ajnr.A6373
Vidal, L.L.M.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Viguier, A.
- Extracranial VascularYou have accessStandard Diffusion-Weighted Imaging in the Brain Can Detect Cervical Internal Carotid Artery DissectionsG. Adam, J. Darcourt, M. Roques, M. Ferrier, R. Gramada, Z. Meluchova, S. Patsoura, A. Viguier, C. Cognard, V. Larrue and F. BonnevilleAmerican Journal of Neuroradiology February 2020, 41 (2) 318-322; DOI: https://doi.org/10.3174/ajnr.A6383
Volny, O.
- Practice PerspectivesOpen AccessDisplaying Multiphase CT Angiography Using a Time-Variant Color Map: Practical Considerations and Potential Applications in Patients with Acute StrokeJ.M. Ospel, O. Volny, W. Qiu, M. Najm, N. Kashani, M. Goyal and B.K. MenonAmerican Journal of Neuroradiology February 2020, 41 (2) 200-205; DOI: https://doi.org/10.3174/ajnr.A6376
W
Wälchli, T.
- FELLOWS' JOURNAL CLUBClinical ReportYou have accessArtery of Davidoff and Schechter Supply in Dural Arteriovenous FistulasK.D. Bhatia, H. Kortman, T. Wälchli, I. Radovanovic, V.M. Pereira and T. KringsAmerican Journal of Neuroradiology February 2020, 41 (2) 300-304; DOI: https://doi.org/10.3174/ajnr.A6380
The artery of Davidoff and Schechter is a dural branch of the posterior cerebral artery that can supply the meninges close to the falcotentorial junction. It is usually not identified on angiography except when enlarged in the setting of a dural AVF or meningioma. The impact on treatment of the artery of Davidoff and Schechter supply to a fistula is not well-described in the literature. The authors' retrospective analysis of patients with dural AVFs treated at the Toronto Western Hospital between 2006 and 2018 identified 6 patients with dural AVFs receiving supply from the artery of Davidoff and Schechter (of a total of 173 patients with dural AVFs). All patients were initially treated by transarterial embolization using liquid embolic agents. Three patients required a second endovascular procedure partly due to residual supply from the artery of Davidoff and Schechter.
Wang, D.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Wang, H.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Wang, Y.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Waqas, M.
- EDITOR'S CHOICEAdult BrainYou have accessAssessment of a Bayesian Vitrea CT Perfusion Analysis to Predict Final Infarct and Penumbra Volumes in Patients with Acute Ischemic Stroke: A Comparison with RAPIDR.A. Rava, K.V. Snyder, M. Mokin, M. Waqas, A.B. Allman, J.L. Senko, A.R. Podgorsak, M.M. Shiraz Bhurwani, Y. Hoi, A.H. Siddiqui, J.M. Davies, E.I. Levy and C.N. IonitaAmerican Journal of Neuroradiology February 2020, 41 (2) 206-212; DOI: https://doi.org/10.3174/ajnr.A6395
Data were retrospectively collected for 105 patients with acute ischemic stroke (55 patients with successful recanalization [TICI 2b/2c/3] and large-vessel occlusions and 50 patients without interventions). Final infarct volumes were calculated using DWI and FLAIR 24 hours following CTP imaging. RAPID and the Vitrea Bayesian CTP algorithm (with 3 different settings) predicted infarct and penumbra volumes for comparison with final infarct volumes to assess software performance. RAPID and Vitrea default setting had the most accurate final infarct volume prediction in patients with interventions. Default Vitrea and RAPID were the most and least accurate in determining final infarct volume for patients without an intervention, respectively. Compared with RAPID, the Vitrea default setting was noninferior for patients with interventions and superior in penumbra estimation for patients without interventions as indicated by mean infarct differences and correlations with final infarct volumes.
Weinberg, B.D.
- Adult BrainYou have accessPredictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department SettingA.L. Callen, D.S. Chow, Y.A. Chen, H.R. Richelle, J. Pao, M. Bardis, B.D. Weinberg, C.P. Hess and L.P. SugrueAmerican Journal of Neuroradiology February 2020, 41 (2) 213-218; DOI: https://doi.org/10.3174/ajnr.A6408
Weiss, M.D.
- PediatricsYou have accessFrequency, Extent, and Correlates of Superficial Siderosis and Ependymal Siderosis in Premature Infants with Germinal Matrix Hemorrhage: An SWI StudyM.S. Albayram, G. Smith, F. Tufan and M.D. WeissAmerican Journal of Neuroradiology February 2020, 41 (2) 331-337; DOI: https://doi.org/10.3174/ajnr.A6371
Welsh, J.
- LETTERYou have accessComments on “Prolonged Microgravity Affects Human Brain Structure and Function”J.J. Bevelacqua, J. Welsh and S.M.J. MortazaviAmerican Journal of Neuroradiology February 2020, 41 (2) E7; DOI: https://doi.org/10.3174/ajnr.A6387
Wilson, A.T.
- InterventionalYou have accessHow Do Physicians Approach Intravenous Alteplase Treatment in Patients with Acute Ischemic Stroke Who Are Eligible for Intravenous Alteplase and Endovascular Therapy? Insights from UNMASK-EVTJ.M. Ospel, N. Kashani, U. Fischer, B.K. Menon, M. Almekhlafi, A.T. Wilson, M.M. Foss, G. Saposnik, M. Goyal and M.D. HillAmerican Journal of Neuroradiology February 2020, 41 (2) 262-267; DOI: https://doi.org/10.3174/ajnr.A6396
Wright, C.H.
- Clinical ReportYou have accessIntra-Arterial Verapamil Treatment in Oral Therapy–Refractory Reversible Cerebral Vasoconstriction SyndromeJ.M. Ospel, C.H. Wright, R. Jung, L.L.M. Vidal, S. Manjila, G. Singh, D.V. Heck, A. Ray and K.A. BlackhamAmerican Journal of Neuroradiology February 2020, 41 (2) 293-299; DOI: https://doi.org/10.3174/ajnr.A6378
Y
Yamada, K.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Yamashita, A.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Yamashita, Y.
- Adult BrainYou have accessMetal Artifact Reduction in Head CT Performed for Patients with Deep Brain Stimulation Devices: Effectiveness of a Single-Energy Metal Artifact Reduction AlgorithmY. Nagayama, S. Tanoue, S. Oda, D. Sakabe, T. Emoto, M. Kidoh, H. Uetani, A. Sasao, T. Nakaura, O. Ikeda, K. Yamada and Y. YamashitaAmerican Journal of Neuroradiology February 2020, 41 (2) 231-237; DOI: https://doi.org/10.3174/ajnr.A6375
Yang, J.Y.-M.
- Clinical ReportYou have accessMacrocerebellum in Achondroplasia: A Further CNS Manifestation of FGFR3 Mutations?H.M. Pascoe, J.Y.-M. Yang, J. Chen, A.M. Fink and S. KumblaAmerican Journal of Neuroradiology February 2020, 41 (2) 338-342; DOI: https://doi.org/10.3174/ajnr.A6369
Yang, Z.-H.
- Adult BrainOpen AccessMR Diffusional Kurtosis Imaging–Based Assessment of Brain Microstructural Changes in Patients with Moyamoya Disease before and after RevascularizationP.-G. Qiao, X. Cheng, G.-J. Li, P. Song, C. Han and Z.-H. YangAmerican Journal of Neuroradiology February 2020, 41 (2) 246-254; DOI: https://doi.org/10.3174/ajnr.A6392
Yeom, J.A.
- InterventionalYou have accessAsymptomatic Cerebral Vasoconstriction after Carotid Artery StentingC.H. Kang, J. Roh, J.A. Yeom, S.H. Ahn, M.G. Park, K.P. Park and S.K. BaikAmerican Journal of Neuroradiology February 2020, 41 (2) 305-309; DOI: https://doi.org/10.3174/ajnr.A6385
Yokogami, K.
- Extracranial VascularOpen AccessCharacterization of Carotid Plaque Components by Quantitative Susceptibility MappingM. Azuma, K. Maekawa, A. Yamashita, K. Yokogami, M. Enzaki, Z.A. Khant, H. Takeshima, Y. Asada, Y. Wang and T. HiraiAmerican Journal of Neuroradiology February 2020, 41 (2) 310-317; DOI: https://doi.org/10.3174/ajnr.A6374
Yuki, I.
- FELLOWS' JOURNAL CLUBInterventionalYou have accessDelayed Leukoencephalopathy: A Rare Complication after Coiling of Cerebral AneurysmsA. Ikemura, T. Ishibashi, K. Otani, I. Yuki, T. Kodama, I. Kan, N. Kato and Y. MurayamaAmerican Journal of Neuroradiology February 2020, 41 (2) 286-292; DOI: https://doi.org/10.3174/ajnr.A6386
Delayed leukoencephalopathy is a rare complication that occurs after endovascular coiling of cerebral aneurysms and is found in the literature with several different names, such as delayed leukoencephalopathy, delayed enhancing lesions, and delayed multiple white matter lesions. Its various suggested etiologies include granulation reaction caused by foreign body emboli from the hydrophilic coating of procedural devices, contrast-induced encephalopathy, and nickel or bioactive polyglycolic/polylactic acid coil sensitivity. The authors analyzed 1754 endovascular coiling procedures of 1594 aneurysms. Sixteen procedures demonstrated delayed leukoencephalopathy on follow-up FLAIR MR imaging examinations after a median period of 71.5 days in the form of high-signal changes in the white matter at locations remote from the coil mass. Seven patients had headaches or hemiparesis, and 9 patients were asymptomatic. All imaging-associated changes improved subsequently. They found evidence of an association between delayed leukoencephalopathy and the number of microcatheters used per procedure, along with evidence suggesting that these procedures required larger median volumes of contrast medium and weak evidence regarding the need for a longer median fluoroscopy duration.
Z
Zand, R.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Zhang, C.
- Adult BrainOpen AccessA Method to Estimate Brain Volume from Head CT Images and Application to Detect Brain Atrophy in Alzheimer DiseaseV. Adduru, S.A. Baum, C. Zhang, M. Helguera, R. Zand, M. Lichtenstein, C.J. Griessenauer and A.M. MichaelAmerican Journal of Neuroradiology February 2020, 41 (2) 224-230; DOI: https://doi.org/10.3174/ajnr.A6402
Zhao, Y.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.
Zwart, N.R.
- EDITOR'S CHOICEAdult BrainYou have accessSpiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical EvaluationM.B. Ooi, Z. Li, R.K. Robison, D. Wang, A.G. Anderson, N.R. Zwart, A. Bakhru, S. Nagaraj, T. Mathews, S. Hey, J.J. Koonen, I.E. Dimitrov, H.T. Friel, Q. Lu, M. Obara, I. Saha, H. Wang, Y. Wang, Y. Zhao, M. Temkit, H.H. Hu, T.L. Chenevert, O. Togao, J.A. Tkach, U.D. Nagaraj, M.C. Pinho, R.K. Gupta, J.E. Small, M.M. Kunst, J.P. Karis, J.B. Andre, J.H. Miller, N.K. Pinter and J.G. PipeAmerican Journal of Neuroradiology February 2020, 41 (2) 238-245; DOI: https://doi.org/10.3174/ajnr.A6409
The authors report a multicenter multireader study that was designed to compare spiral with standard-of-care Cartesian postcontrast structural brain MR imaging on the basis of relative performance in 10 metrics of image quality, artifact prevalence, and diagnostic benefit. Seven clinical sites acquired 88 total subjects. For each subject, sites acquired 2 postcontrast MR imaging scans: a spiral 2D T1 spin-echo, and 1 of 4 routine Cartesian 2D T1 spin-echo/TSE scans. Nine neuroradiologists independently reviewed each subject, with the matching pair of spiral and Cartesian scans compared side-by-side, and scored the subject on 10 image-quality metrics. Spiral was superior to Cartesian in 7 of 10 metrics (flow artifact mitigation, SNR, GM/WM contrast, image sharpness, lesion conspicuity, preference for diagnosing abnormal enhancement, and overall intracranial image quality), comparable in 1 of 10 metrics (motion artifacts), and inferior in 2 of 10 metrics (susceptibility artifacts, overall extracranial image quality). Spiral 2D T1 spin-echo for routine structural brain MR imaging is feasible in the clinic with conventional scanners and was preferred by neuroradiologists for overall postcontrast intracranial evaluation.