Index by author
A
Aggarwal, A.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Ai, Q.-Y.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Akamatsu, Y.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Alberich, M.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Almeida, L.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Amirabadi, A.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
Anderson, J.
- FELLOWS' JOURNAL CLUBEditorialYou have accessNeuroradiology Fellowship Requirements: Updates in 2019T.A. Kennedy and J. AndersonAmerican Journal of Neuroradiology March 2020, 41 (3) 370-372; DOI: https://doi.org/10.3174/ajnr.A6450
Notable changes made since the prior requirements were last revised in 2007 primarily affect the number of required procedures, the academic support defined for the program director, and modifications to the curriculum. The new requirements allow fellows to fulfill the foundational expectations for the neuroradiology fellowship and encourage programs to maintain some flexibility to teach individual specialty areas of clinical excellence.
Andre, J.B.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
Andronikou, S.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
Argyropoulou, M.I.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Astrakas, L.G.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
Auger, C.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Aviv, R.I.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
B
Baek, H.J.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Bala, F.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Baladandayuthapani, V.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Baradaran, H.
- Extracranial VascularOpen AccessCarotid Vessel Wall Imaging on CTAH. Baradaran and A. GuptaAmerican Journal of Neuroradiology March 2020, 41 (3) 380-386; DOI: https://doi.org/10.3174/ajnr.A6403
Baumann, Marlene Julie
- You have accessPerspectivesMarlene Julie BaumannAmerican Journal of Neuroradiology March 2020, 41 (3) 369; DOI: https://doi.org/10.3174/ajnr.P0105
Baxter, L.C.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Becker, J.L.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Bendok, B.R.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Berlis, A.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Blackham, K.A.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Blom, H.M.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Bommeljé, C.C.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Bouillot, P.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Boxerman, J.L.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Brehm, A.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Bretzner, M.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Bricout, N.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Brina, O.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Brosch, T.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Burns, M.R.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
C
Calandri, I.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Chan, A.T.C.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Chan, K.C.A.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Charbel, M.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Chiu, R.W.K.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Choi, B.H.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Cianfoni, A.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Correale, J.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Cosottini, M.
- LETTERYou have accessReply:R. Guerrini, F. Giordano and M. CosottiniAmerican Journal of Neuroradiology March 2020, 41 (3) E12; DOI: https://doi.org/10.3174/ajnr.A6490
Cross, N.M.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
D
Dargis, D.M.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
de Borst, G.J.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
De Deyn, P.P.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
Delattre, B.M.A.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Demerath, T.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
de Pont, L.M.H.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Dirks, P.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
Dlamini, N.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
Dobrocky, T.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Doshi, A.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Drougia, A.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
E
Echeverry, N.B.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Eisinger, R.S.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Elsheikh, S.
- InterventionalYou have accessContrast Enhancement of Intracranial Aneurysms on 3T 3D Black-Blood MRI and Its Relationship to Aneurysm Recurrence following Endovascular TreatmentS. Elsheikh, H. Urbach and S. MeckelAmerican Journal of Neuroradiology March 2020, 41 (3) 495-500; DOI: https://doi.org/10.3174/ajnr.A6440
Enblad, P.
- Adult BrainYou have accessHigh Intravascular Signal Arterial Transit Time Artifacts Have Negligible Effects on Cerebral Blood Flow and Cerebrovascular Reserve Capacity Measurement Using Single Postlabel Delay Arterial Spin-Labeling in Patients with Moyamoya DiseaseM. Fahlström, A. Lewén, P. Enblad, E.-M. Larsson and J. WikströmAmerican Journal of Neuroradiology March 2020, 41 (3) 430-436; DOI: https://doi.org/10.3174/ajnr.A6411
Eschbacher, J.M.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
F
Fahlström, M.
- Adult BrainYou have accessHigh Intravascular Signal Arterial Transit Time Artifacts Have Negligible Effects on Cerebral Blood Flow and Cerebrovascular Reserve Capacity Measurement Using Single Postlabel Delay Arterial Spin-Labeling in Patients with Moyamoya DiseaseM. Fahlström, A. Lewén, P. Enblad, E.-M. Larsson and J. WikströmAmerican Journal of Neuroradiology March 2020, 41 (3) 430-436; DOI: https://doi.org/10.3174/ajnr.A6411
Figueiredo, E.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Finsterer, J.
- LETTERYou have accessStroke-like Episodes in m.3243A≥G Carriers Need to Be Monitored by MRI Starting with the Onset of Clinical ManifestationsJ. FinstererAmerican Journal of Neuroradiology March 2020, 41 (3) E17-E18; DOI: https://doi.org/10.3174/ajnr.A6418
Fischer, S.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Foote, K.D.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Fuentes, D.T.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Fuller, G.N.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
G
Gaitán, M.I.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Garcia-Vidal, A.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Gates, E.D.H.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Giapros, V.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
Gibson, C.R.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
Gifford, S.E.
- SpineYou have accessLumbar Puncture: Creation and Resident Acceptance of a Low-Cost, Durable, Reusable Fluoroscopic Phantom with a Fluid-Filled Spinal Canal for Training at an Academic ProgramD.J. Lerner, S.E. Gifford, N. Olafsen, A. Mileto and E. SoloffAmerican Journal of Neuroradiology March 2020, 41 (3) 548-550; DOI: https://doi.org/10.3174/ajnr.A6439
Giordano, F.
- LETTERYou have accessReply:R. Guerrini, F. Giordano and M. CosottiniAmerican Journal of Neuroradiology March 2020, 41 (3) E12; DOI: https://doi.org/10.3174/ajnr.A6490
Goel, I.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
Gomez-Paz, S.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Gonzales, A.C.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Gory, B.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Gralla, J.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Grewal, S.S.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Griessenauer, C.J.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Guerrero, M.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Guerrini, R.
- LETTERYou have accessReply:R. Guerrini, F. Giordano and M. CosottiniAmerican Journal of Neuroradiology March 2020, 41 (3) E12; DOI: https://doi.org/10.3174/ajnr.A6490
Guillaud, O.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Gupta, A.
- Extracranial VascularOpen AccessCarotid Vessel Wall Imaging on CTAH. Baradaran and A. GuptaAmerican Journal of Neuroradiology March 2020, 41 (3) 380-386; DOI: https://doi.org/10.3174/ajnr.A6403
H
Ha, J.Y.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Hacein-Bey, L.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Hall, C.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
Hamilton, J.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Hammer, S.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Hao, Q.
- Adult BrainYou have accessVessel Wall MRI Enhancement in Noninflammatory Cerebral Amyloid AngiopathyQ. Hao, N.M. Tsankova, H. Shoirah, C.P. Kellner and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 446-448; DOI: https://doi.org/10.3174/ajnr.A6445
Hawkins, R.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
Hazle, J.D.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Hendrikse, J.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Hodel, J.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Hoxworth, J.M.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Hu, B.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Hu, L.S.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Hui, E.P.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Hwang, M.J.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
I
Ibrahim, A.Y.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
J
Jin, L.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Joachimski, F.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Johnson, K.J.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Jorritsma, N.K.N.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
K
Kanal, E.
- Patient SafetyOpen AccessNephrogenic Systemic Fibrosis Risk Assessment and Skin Biopsy Quantification in Patients with Renal Disease following Gadobenate Contrast AdministrationE. Kanal, T.J. Patton, I. Krefting and C. WangAmerican Journal of Neuroradiology March 2020, 41 (3) 393-399; DOI: https://doi.org/10.3174/ajnr.A6448
Kellner, C.P.
- Adult BrainYou have accessVessel Wall MRI Enhancement in Noninflammatory Cerebral Amyloid AngiopathyQ. Hao, N.M. Tsankova, H. Shoirah, C.P. Kellner and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 446-448; DOI: https://doi.org/10.3174/ajnr.A6445
Kennedy, T.A.
- FELLOWS' JOURNAL CLUBEditorialYou have accessNeuroradiology Fellowship Requirements: Updates in 2019T.A. Kennedy and J. AndersonAmerican Journal of Neuroradiology March 2020, 41 (3) 370-372; DOI: https://doi.org/10.3174/ajnr.A6450
Notable changes made since the prior requirements were last revised in 2007 primarily affect the number of required procedures, the academic support defined for the program director, and modifications to the curriculum. The new requirements allow fellows to fulfill the foundational expectations for the neuroradiology fellowship and encourage programs to maintain some flexibility to teach individual specialty areas of clinical excellence.
Kihira, S.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Kim, T.B.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
King, A.D.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Klein, R.R.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Koo, C.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Koopman, J.P.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Krefting, I.
- Patient SafetyOpen AccessNephrogenic Systemic Fibrosis Risk Assessment and Skin Biopsy Quantification in Patients with Renal Disease following Gadobenate Contrast AdministrationE. Kanal, T.J. Patton, I. Krefting and C. WangAmerican Journal of Neuroradiology March 2020, 41 (3) 393-399; DOI: https://doi.org/10.3174/ajnr.A6448
Krishna, C.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Kuchcinski, G.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
L
Lam, W.K.J.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Larsson, E.-M.
- Adult BrainYou have accessHigh Intravascular Signal Arterial Transit Time Artifacts Have Negligible Effects on Cerebral Blood Flow and Cerebrovascular Reserve Capacity Measurement Using Single Postlabel Delay Arterial Spin-Labeling in Patients with Moyamoya DiseaseM. Fahlström, A. Lewén, P. Enblad, E.-M. Larsson and J. WikströmAmerican Journal of Neuroradiology March 2020, 41 (3) 430-436; DOI: https://doi.org/10.3174/ajnr.A6411
Leclerc, X.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Lee, A.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Lee, L.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
Leiner, T.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Leon, G.D.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Lerner, D.J.
- SpineYou have accessLumbar Puncture: Creation and Resident Acceptance of a Low-Cost, Durable, Reusable Fluoroscopic Phantom with a Fluid-Filled Spinal Canal for Training at an Academic ProgramD.J. Lerner, S.E. Gifford, N. Olafsen, A. Mileto and E. SoloffAmerican Journal of Neuroradiology March 2020, 41 (3) 548-550; DOI: https://doi.org/10.3174/ajnr.A6439
Lewén, A.
- Adult BrainYou have accessHigh Intravascular Signal Arterial Transit Time Artifacts Have Negligible Effects on Cerebral Blood Flow and Cerebrovascular Reserve Capacity Measurement Using Single Postlabel Delay Arterial Spin-Labeling in Patients with Moyamoya DiseaseM. Fahlström, A. Lewén, P. Enblad, E.-M. Larsson and J. WikströmAmerican Journal of Neuroradiology March 2020, 41 (3) 430-436; DOI: https://doi.org/10.3174/ajnr.A6411
Li, X.L.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Li, Z.F.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Lin, J.S.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Liu, J.M.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Lo, Y.M.D.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Lövblad, K.-O.
- LETTEROpen AccessTime to Refocus the Target in Stroke Therapy Again?K.-O. LövbladAmerican Journal of Neuroradiology March 2020, 41 (3) E13; DOI: https://doi.org/10.3174/ajnr.A6416
Lövblad, K.O.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Lu, C.-Q.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Lu, G.M.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
M
Ma, B.B.Y.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Machi, P.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
MacKinnon, G.A.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Mader, T.H.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
Mantripragada, K.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Maurer, C.J.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Mazza, G.L.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Meckel, S.
- InterventionalYou have accessContrast Enhancement of Intracranial Aneurysms on 3T 3D Black-Blood MRI and Its Relationship to Aneurysm Recurrence following Endovascular TreatmentS. Elsheikh, H. Urbach and S. MeckelAmerican Journal of Neuroradiology March 2020, 41 (3) 495-500; DOI: https://doi.org/10.3174/ajnr.A6440
Middlebrooks, E.H.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Mileto, A.
- SpineYou have accessLumbar Puncture: Creation and Resident Acceptance of a Low-Cost, Durable, Reusable Fluoroscopic Phantom with a Fluid-Filled Spinal Canal for Training at an Academic ProgramD.J. Lerner, S.E. Gifford, N. Olafsen, A. Mileto and E. SoloffAmerican Journal of Neuroradiology March 2020, 41 (3) 548-550; DOI: https://doi.org/10.3174/ajnr.A6439
Mo, F.K.F.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Möhlenbruch, M.A.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Montalban, X.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Moon, J.I.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Moore, J.M.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Moran, Christopher J.
- InterventionalYou have accessThe Collar Sign in Pipeline Embolization Device–Treated AneurysmsChristopher J. MoranAmerican Journal of Neuroradiology March 2020, 41 (3) 486-487; DOI: https://doi.org/10.3174/ajnr.A6465
Morrow, S.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
Mouka, V.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
Mrugala, M.M.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Muthusami, P.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
N
Nael, K.
- Adult BrainYou have accessVessel Wall MRI Enhancement in Noninflammatory Cerebral Amyloid AngiopathyQ. Hao, N.M. Tsankova, H. Shoirah, C.P. Kellner and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 446-448; DOI: https://doi.org/10.3174/ajnr.A6445
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Neuberger, U.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Ni, Q.Q.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
O
Ogilvy, C.S.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Okromelidze, L.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Okun, M.S.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Olafsen, N.
- SpineYou have accessLumbar Puncture: Creation and Resident Acceptance of a Low-Cost, Durable, Reusable Fluoroscopic Phantom with a Fluid-Filled Spinal Canal for Training at an Academic ProgramD.J. Lerner, S.E. Gifford, N. Olafsen, A. Mileto and E. SoloffAmerican Journal of Neuroradiology March 2020, 41 (3) 548-550; DOI: https://doi.org/10.3174/ajnr.A6439
Outteryck, O.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Owen, R.P.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
P
Paday Formenti, M.E.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Pan, C.W.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Pareto, D.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Park, S.E.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Patel, V.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Patra, D.P.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Patton, T.J.
- Patient SafetyOpen AccessNephrogenic Systemic Fibrosis Risk Assessment and Skin Biopsy Quantification in Patients with Renal Disease following Gadobenate Contrast AdministrationE. Kanal, T.J. Patton, I. Krefting and C. WangAmerican Journal of Neuroradiology March 2020, 41 (3) 393-399; DOI: https://doi.org/10.3174/ajnr.A6448
Pawha, P.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
- Patient SafetyYou have accessReduction of Radiation Dose and Scanning Time While Preserving Diagnostic Yield: A Comparison of Battery-Powered and Manual Bone Biopsy SystemsS. Kihira, C. Koo, A. Lee, A. Aggarwal, P. Pawha and A. DoshiAmerican Journal of Neuroradiology March 2020, 41 (3) 387-392; DOI: https://doi.org/10.3174/ajnr.A6428
Porter, A.B.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Pourier, V.E.C.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Prabhu, S.S.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Pruvo, J.-P.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Psychogios, M.N.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Q
Quarles, C.C.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
R
Ramdane, N.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
Rana, M.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
Ranvier, G.F.
- EDITOR'S CHOICEHead & NeckYou have access4D–Dynamic Contrast-Enhanced MRI for Preoperative Localization in Patients with Primary HyperparathyroidismJ.L. Becker, V. Patel, K.J. Johnson, M. Guerrero, R.R. Klein, G.F. Ranvier, R.P. Owen, P. Pawha and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 522-528; DOI: https://doi.org/10.3174/ajnr.A6482
The authors tested the hypothesis that recently introduced 4D dynamic contrast-enhanced MR imaging with high spatial and temporal resolution has equivalent accuracy to 4D-CT for preoperative gland localization in primary hyperparathyroidism. Fifty-four patients met the inclusion criteria: 37 had single-gland disease, and 17, multigland disease—9 with double-gland hyperplasia; 3 with 3-gland hyperplasia, and 5 with 4-gland hyperplasia. For single-gland disease, the gland was correctly located in 92% of patients, with correct identification of the side in 100% and the quadrant in 92%. For multigland disease, the glands were correctly located in 74% of patients, with correct identification of the side in 74% and the quadrant in 77%. The high spatial and temporal resolution 4D dynamic contrast-enhanced MR imaging provides excellent diagnostic performance for preoperative localization in primary hyperparathyroidism.
Reymond, P.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Reyns, N.
- Adult BrainYou have accessFollow-Up MRI for Small Brain AVMs Treated by Radiosurgery: Is Gadolinium Really Necessary?X. Leclerc, O. Guillaud, N. Reyns, J. Hodel, O. Outteryck, F. Bala, N. Bricout, M. Bretzner, N. Ramdane, J.-P. Pruvo, L. Hacein-Bey and G. KuchcinskiAmerican Journal of Neuroradiology March 2020, 41 (3) 437-445; DOI: https://doi.org/10.3174/ajnr.A6404
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 March 2020, 41 (3) E16; DOI: https://doi.org/10.3174/ajnr.A6431
Rots, M.L.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Rovira, À.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Ryu, K.H.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
S
Saalbach, A.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
Sabacinski, K.A.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Sastre-Garriga, J.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Sati, P.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Savage, R.H.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Schellingerhout, D.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Schmainda, K.M.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Schoepf, U.J.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Sengupta, A.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
Shah, S.S.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Shapiro, S.Z.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Shatil, A.S.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
Shen, H.J.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Shi, Z.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Shoirah, H.
- Adult BrainYou have accessVessel Wall MRI Enhancement in Noninflammatory Cerebral Amyloid AngiopathyQ. Hao, N.M. Tsankova, H. Shoirah, C.P. Kellner and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 446-448; DOI: https://doi.org/10.3174/ajnr.A6445
Shroff, M.M.
- PediatricsYou have accessFractional Flow on TOF-MRA as a Measure of Stroke Risk in Children with Intracranial Arterial StenosisA.Y. Ibrahim, A. Amirabadi, M.M. Shroff, N. Dlamini, P. Dirks and P. MuthusamiAmerican Journal of Neuroradiology March 2020, 41 (3) 535-541; DOI: https://doi.org/10.3174/ajnr.A6441
Singleton, K.W.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Skare, S.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Smith, K.A.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Snelling, B.M.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
So, T.Y.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Soloff, E.
- SpineYou have accessLumbar Puncture: Creation and Resident Acceptance of a Low-Cost, Durable, Reusable Fluoroscopic Phantom with a Fluid-Filled Spinal Canal for Training at an Academic ProgramD.J. Lerner, S.E. Gifford, N. Olafsen, A. Mileto and E. SoloffAmerican Journal of Neuroradiology March 2020, 41 (3) 548-550; DOI: https://doi.org/10.3174/ajnr.A6439
Sommer, K.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCorrection of Motion Artifacts Using a Multiscale Fully Convolutional Neural NetworkK. Sommer, A. Saalbach, T. Brosch, C. Hall, N.M. Cross and J.B. AndreAmerican Journal of Neuroradiology March 2020, 41 (3) 416-423; DOI: https://doi.org/10.3174/ajnr.A6436
The authors implement and validate an MRI motion-artifact correction method using a multiscale fully convolutional neural network. Application of the network resulted in notably improved image quality without the loss of morphologic information. For synthetic test data, the average reduction in mean squared error was 41.84%. The blinded reader study on the real-world test data resulted in significant reduction in mean artifact scores across all cases.
Sprenger, T.
- Adult BrainOpen AccessClinical Experience of 1-Minute Brain MRI Using a Multicontrast EPI Sequence in a Different Scan EnvironmentK.H. Ryu, H.J. Baek, S. Skare, J.I. Moon, B.H. Choi, S.E. Park, J.Y. Ha, T.B. Kim, M.J. Hwang and T. SprengerAmerican Journal of Neuroradiology March 2020, 41 (3) 424-429; DOI: https://doi.org/10.3174/ajnr.A6427
Stein, A.A.
- InterventionalYou have accessAccess-Site Complications in Mechanical Thrombectomy for Acute Ischemic Stroke: A Review of Prospective TrialsS.Z. Shapiro, K.A. Sabacinski, K. Mantripragada, S.S. Shah, A.A. Stein, N.B. Echeverry, G.A. MacKinnon and B.M. SnellingAmerican Journal of Neuroradiology March 2020, 41 (3) 477-481; DOI: https://doi.org/10.3174/ajnr.A6423
Stokes, A.M.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Su, T.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Swanson, K.R.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
T
Thomas, A.J.
- InterventionalYou have accessImplications of the Collar Sign in Incompletely Occluded Aneurysms after Pipeline Embolization Device Implantation: A Follow-Up StudyS. Gomez-Paz, Y. Akamatsu, J.M. Moore, C.S. Ogilvy, A.J. Thomas and C.J. GriessenauerAmerican Journal of Neuroradiology March 2020, 41 (3) 482-485; DOI: https://doi.org/10.3174/ajnr.A6415
Tintoré, M.
- Adult BrainOpen AccessRatio of T1-Weighted to T2-Weighted Signal Intensity as a Measure of Tissue Integrity: Comparison with Magnetization Transfer Ratio in Patients with Multiple SclerosisD. Pareto, A. Garcia-Vidal, M. Alberich, C. Auger, X. Montalban, M. Tintoré, J. Sastre-Garriga and À. RoviraAmerican Journal of Neuroradiology March 2020, 41 (3) 461-463; DOI: https://doi.org/10.3174/ajnr.A6481
Tsankova, N.M.
- Adult BrainYou have accessVessel Wall MRI Enhancement in Noninflammatory Cerebral Amyloid AngiopathyQ. Hao, N.M. Tsankova, H. Shoirah, C.P. Kellner and K. NaelAmerican Journal of Neuroradiology March 2020, 41 (3) 446-448; DOI: https://doi.org/10.3174/ajnr.A6445
Tse, I.O.L.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Tsuboi, T.
- FunctionalYou have accessFunctional and Structural Connectivity Patterns Associated with Clinical Outcomes in Deep Brain Stimulation of the Globus Pallidus Internus for Generalized DystoniaL. Okromelidze, T. Tsuboi, R.S. Eisinger, M.R. Burns, M. Charbel, M. Rana, S.S. Grewal, C.-Q. Lu, L. Almeida, K.D. Foote, M.S. Okun and E.H. MiddlebrooksAmerican Journal of Neuroradiology March 2020, 41 (3) 508-514; DOI: https://doi.org/10.3174/ajnr.A6429
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Urbach, H.
- InterventionalYou have accessContrast Enhancement of Intracranial Aneurysms on 3T 3D Black-Blood MRI and Its Relationship to Aneurysm Recurrence following Endovascular TreatmentS. Elsheikh, H. Urbach and S. MeckelAmerican Journal of Neuroradiology March 2020, 41 (3) 495-500; DOI: https://doi.org/10.3174/ajnr.A6440
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Valencia-Calderón, C.J.
- LETTERYou have accessNeuronavigation in the Identification and Presurgical Planning of Cortical Focal DysplasiaC.J. Valencia-CalderónAmerican Journal of Neuroradiology March 2020, 41 (3) E10-E11; DOI: https://doi.org/10.3174/ajnr.A6417
van Laarhoven, C.J.H.C.M.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Van Ombergen, A.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
van Steekelenburg, J.M.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
van Weijnen, A.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Vargas, M.I.
- InterventionalOpen AccessLarge Neck and Strong Ostium Inflow as the Potential Causes for Delayed Occlusion of Unruptured Sidewall Intracranial Aneurysms Treated by Flow DiverterT. Su, P. Reymond, O. Brina, P. Bouillot, P. Machi, B.M.A. Delattre, L. Jin, K.O. Lövblad and M.I. VargasAmerican Journal of Neuroradiology March 2020, 41 (3) 488-494; DOI: https://doi.org/10.3174/ajnr.A6413
Verbist, B.M.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Vergouwen, M.D.I.
- Extracranial VascularYou have accessGadolinium Enhancement of the Aneurysm Wall in Extracranial Carotid Artery AneurysmsC.J.H.C.M. van Laarhoven, M.L. Rots, V.E.C. Pourier, N.K.N. Jorritsma, T. Leiner, J. Hendrikse, M.D.I. Vergouwen and G.J. de BorstAmerican Journal of Neuroradiology March 2020, 41 (3) 501-507; DOI: https://doi.org/10.3174/ajnr.A6442
Vijlbrief, O.D.
- Head & NeckOpen AccessValue of Endolymphatic Hydrops and Perilymph Signal Intensity in Suspected Ménière DiseaseJ.M. van Steekelenburg, A. van Weijnen, L.M.H. de Pont, O.D. Vijlbrief, C.C. Bommeljé, J.P. Koopman, B.M. Verbist, H.M. Blom and S. HammerAmerican Journal of Neuroradiology March 2020, 41 (3) 529-534; DOI: https://doi.org/10.3174/ajnr.A6410
Vlantis, A.C.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
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Wang, C.
- Patient SafetyOpen AccessNephrogenic Systemic Fibrosis Risk Assessment and Skin Biopsy Quantification in Patients with Renal Disease following Gadobenate Contrast AdministrationE. Kanal, T.J. Patton, I. Krefting and C. WangAmerican Journal of Neuroradiology March 2020, 41 (3) 393-399; DOI: https://doi.org/10.3174/ajnr.A6448
Weinberg, J.S.
- Adult BrainOpen AccessImaging-Based Algorithm for the Local Grading of GliomaE.D.H. Gates, J.S. Lin, J.S. Weinberg, S.S. Prabhu, J. Hamilton, J.D. Hazle, G.N. Fuller, V. Baladandayuthapani, D.T. Fuentes and D. SchellingerhoutAmerican Journal of Neuroradiology March 2020, 41 (3) 400-407; DOI: https://doi.org/10.3174/ajnr.A6405
Wikström, J.
- Adult BrainYou have accessHigh Intravascular Signal Arterial Transit Time Artifacts Have Negligible Effects on Cerebral Blood Flow and Cerebrovascular Reserve Capacity Measurement Using Single Postlabel Delay Arterial Spin-Labeling in Patients with Moyamoya DiseaseM. Fahlström, A. Lewén, P. Enblad, E.-M. Larsson and J. WikströmAmerican Journal of Neuroradiology March 2020, 41 (3) 430-436; DOI: https://doi.org/10.3174/ajnr.A6411
Woo, J.K.S.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Wostyn, P.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
Wuyts, F.L.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430
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Xing, P.F.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Xydis, V.G.
- PediatricsYou have accessIs Low-Grade Intraventricular Hemorrhage in Very Preterm Infants an Innocent Condition? Structural and Functional Evaluation of the Brain Reveals Regional Neurodevelopmental AbnormalitiesM.I. Argyropoulou, L.G. Astrakas, V.G. Xydis, A. Drougia, V. Mouka, I. Goel, V. Giapros and S. AndronikouAmerican Journal of Neuroradiology March 2020, 41 (3) 542-547; DOI: https://doi.org/10.3174/ajnr.A6438
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Yañez, P.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessSWAN-Venule: An Optimized MRI Technique to Detect the Central Vein Sign in MS PlaquesM.I. Gaitán, P. Yañez, M.E. Paday Formenti, I. Calandri, E. Figueiredo, P. Sati and J. CorrealeAmerican Journal of Neuroradiology March 2020, 41 (3) 456-460; DOI: https://doi.org/10.3174/ajnr.A6437
Multiple sclerosis lesions develop around small veins that are radiologically described as the so-called central vein sign. With 7T MR imaging and magnetic susceptibility-based sequences, the central vein sign has been observed in 80%–100% of MS lesions in patients' brains. However, a lower proportion ∼50% has been reported at 3T using SWAN. The authors' aim was to assess a modified version of SWAN optimized at 3T for sensitive detection of the central vein sign. Thirty subjects with MS were scanned on a 3T clinical MR imaging system. 3D T2-weighted FLAIR and optimized 3D SWAN, called SWAN-venule, were acquired after injection of a gadolinium-based contrast agent. Overall, the central vein sign was detected in 86% of the white matter lesions (periventricular, 89%; deep white matter, 95%; and juxtacortical, 78%). The SWAN-venule technique is an optimized MR imaging sequence for highly sensitive detection of the central vein sign in MS brain lesions.
Yang, P.F.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Yip, K.W.N.
- EDITOR'S CHOICEHead & NeckOpen AccessEarly Detection of Cancer: Evaluation of MR Imaging Grading Systems in Patients with Suspected Nasopharyngeal CarcinomaA.D. King, J.K.S. Woo, Q.-Y. Ai, F.K.F. Mo, T.Y. So, W.K.J. Lam, I.O.L. Tse, A.C. Vlantis, K.W.N. Yip, E.P. Hui, B.B.Y. Ma, R.W.K. Chiu, A.T.C. Chan, Y.M.D. Lo and K.C.A. ChanAmerican Journal of Neuroradiology March 2020, 41 (3) 515-521; DOI: https://doi.org/10.3174/ajnr.A6444
Dedicated nasopharyngeal MR imaging before (plain scan system) and after intravenous contrast administration (current and modified systems) was reviewed in patients from a nasopharyngeal carcinoma-endemic region, comprising 383 patients with suspected disease without nasopharyngeal carcinoma and 383 patients with nasopharyngeal carcinoma. The modified and plain scan systems refined primary tumor criteria, added a nodal assessment, and expanded the system from 4 to 5 grades. The current, modified, and plain scan MR imaging systems yielded sensitivities of 99.74%, 97.91%, and 97.65%, respectively, and specificities of 63.45%, 89.56%, and 86.42%, respectively. The modified system yielded significantly better performance than the current and plain systems. In conclusion, the authors propose a modified MR imaging grading system that improves diagnostic performance for nasopharyngeal carcinoma detection. Contrast was not valuable for low MR imaging grades, and the plain scan shows potential for use in screening programs.
Z
Zhang, L.
- Adult BrainYou have accessReduced Global Efficiency and Random Network Features in Patients with Relapsing-Remitting Multiple Sclerosis with Cognitive ImpairmentR. Hawkins, A.S. Shatil, L. Lee, A. Sengupta, L. Zhang, S. Morrow and R.I. AvivAmerican Journal of Neuroradiology March 2020, 41 (3) 449-455; DOI: https://doi.org/10.3174/ajnr.A6435
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Zhang, L.J.
- Adult BrainOpen AccessArtificial Intelligence in the Management of Intracranial Aneurysms: Current Status and Future PerspectivesZ. Shi, B. Hu, U.J. Schoepf, R.H. Savage, D.M. Dargis, C.W. Pan, X.L. Li, Q.Q. Ni, G.M. Lu and L.J. ZhangAmerican Journal of Neuroradiology March 2020, 41 (3) 373-379; DOI: https://doi.org/10.3174/ajnr.A6468
Zhang, Y.W.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Zhang, Y.X.
- InterventionalOpen AccessComparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching AnalysisP.F. Xing, P.F. Yang, Z.F. Li, L. Zhang, H.J. Shen, Y.X. Zhang, Y.W. Zhang and J.M. LiuAmerican Journal of Neuroradiology March 2020, 41 (3) 469-476; DOI: https://doi.org/10.3174/ajnr.A6414
Zhou, Y.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
Zickler, P.
- InterventionalYou have accessEndovascular Thrombectomy of Calcified Emboli in Acute Ischemic Stroke: A Multicenter StudyC.J. Maurer, T. Dobrocky, F. Joachimski, U. Neuberger, T. Demerath, A. Brehm, A. Cianfoni, B. Gory, A. Berlis, J. Gralla, M.A. Möhlenbruch, K.A. Blackham, M.N. Psychogios, P. Zickler and S. FischerAmerican Journal of Neuroradiology March 2020, 41 (3) 464-468; DOI: https://doi.org/10.3174/ajnr.A6412
Zimmerman, R.S.
- EDITOR'S CHOICEAdult BrainOpen AccessPerformance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic BiopsiesJ.M. Hoxworth, J.M. Eschbacher, A.C. Gonzales, K.W. Singleton, G.D. Leon, K.A. Smith, A.M. Stokes, Y. Zhou, G.L. Mazza, A.B. Porter, M.M. Mrugala, R.S. Zimmerman, B.R. Bendok, D.P. Patra, C. Krishna, J.L. Boxerman, L.C. Baxter, K.R. Swanson, C.C. Quarles, K.M. Schmainda and L.S. HuAmerican Journal of Neuroradiology March 2020, 41 (3) 408-415; DOI: https://doi.org/10.3174/ajnr.A6486
This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. The authors recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for recurrent tumor versus posttreatment radiation effects. They recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. They measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%–100%) for normalized and standardized values. With binary cutoffs, predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Standardization of relative CBV achieves similar equivalent performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
zu Eulenburg, P.
- LETTERYou have accessThe Possible Role of Elastic Properties of the Brain and Optic Nerve Sheath in the Development of Spaceflight-Associated Neuro-Ocular SyndromeP. Wostyn, T.H. Mader, C.R. Gibson, F.L. Wuyts, A. Van Ombergen, P. zu Eulenburg and P.P. De DeynAmerican Journal of Neuroradiology March 2020, 41 (3) E14-E15; DOI: https://doi.org/10.3174/ajnr.A6430