Index by author
Dai, D.
- INTERVENTIONALOpen AccessWall Apposition Is a Key Factor for Aneurysm Occlusion after Flow Diversion: A Histologic Evaluation in 41 RabbitsA. Rouchaud, C. Ramana, W. Brinjikji, Y.-H. Ding, D. Dai, T. Gunderson, J. Cebral, D.F. Kallmes and R. KadirvelAmerican Journal of Neuroradiology November 2016, 37 (11) 2087-2091; DOI: https://doi.org/10.3174/ajnr.A4848
Daniels, D.
- EDITOR'S CHOICEADULT BRAINYou have accessEarly Biomarkers from Conventional and Delayed-Contrast MRI to Predict the Response to Bevacizumab in Recurrent High-Grade GliomasD. Daniels, D. Guez, D. Last, C. Hoffmann, D. Nass, A. Talianski, G. Tsarfaty, S. Salomon, A.A. Kanner, D.T. Blumenthal, F. Bokstein, S. Harnof, D. Yekutieli, S. Zamir, Z.R. Cohen, L. Zach and Y. MardorAmerican Journal of Neuroradiology November 2016, 37 (11) 2003-2009; DOI: https://doi.org/10.3174/ajnr.A4866
Twenty-four patients with recurrent high-grade gliomas were scanned before and during bevacizumab treatment with standard and delayed-contrast MRI. The mean change in lesion volumes of responders (overall survival, >1 year) and nonresponders (overall survival, <1 year) was evaluated. Treatment-response-assessment maps (TRAMs) were calculated by subtracting conventional T1WI (acquired a few minutes postcontrast) from delayed T1WI (acquired with a delay of >1 hour postcontrast). These maps depict the spatial distribution of contrast accumulation and clearance. At progression, the increase in lesion volumes in delayed-contrast MR imaging was 37.5% higher than the increase in conventional T1WI. The authors conclude that the benefit of standard and delayed-contrast MRI for assessing and predicting the response to bevacizumab was demonstrated and that the increased sensitivity of delayed-contrast MRI reflects its potential contribution to the management of bevacizumab-treated patients with recurrent HGG.
Debnam, J.M.
- FELLOWS' JOURNAL CLUBHEAD & NECKYou have accessImaging Features of Malignant Lacrimal Sac and Nasolacrimal Duct TumorsV.A. Kumar, B. Esmaeli, S. Ahmed, B. Gogia, J.M. Debnam and L.E. GinsbergAmerican Journal of Neuroradiology November 2016, 37 (11) 2134-2137; DOI: https://doi.org/10.3174/ajnr.A4882
This case series presents 18 patients with primary and secondary malignant lacrimal sac and nasolacrimal duct tumors and their pattern of tumor spread. Squamous cell carcinoma was the most common histology and, in 15/18 patients tumor involved both the lacrimal sac and duct at the time of diagnosis. In 11/16 patients on CT, the nasolacrimal bony canal was smoothly expanded without erosive changes. Tumor was not observed solely within the nasolacrimal duct in any patient. Only 1 patient presented with nodal metastasis and there was no intracranial tumor extension or perineural tumor spread. The authors conclude that malignant lacrimal sac and nasolacrimal duct tumors tend to expand the nasolacrimal bony canal, rather than erode it. CT was superior to MR imaging in characterizing expansion versus erosion of the nasolacrimal bony canal.
Delone, D.R.
- HEAD & NECKYou have accessIs Hypoglossal Nerve Palsy Caused by Craniocervical Junction Degenerative Disease an Underrecognized Entity?S.M. Weindling, R.D. Goff, C.P. Wood, D.R. DeLone and J.M. HoxworthAmerican Journal of Neuroradiology November 2016, 37 (11) 2138-2143; DOI: https://doi.org/10.3174/ajnr.A4885
Demchuk, A.M.
- INTERVENTIONALOpen AccessEffect of Intracranial Atherosclerotic Disease on Endovascular Treatment for Patients with Acute Vertebrobasilar OcclusionY.W. Kim, J.M. Hong, D.G. Park, J.W. Choi, D.-H. Kang, Y.S. Kim, O.O. Zaidat, A.M. Demchuk, Y.H. Hwang and J.S. LeeAmerican Journal of Neuroradiology November 2016, 37 (11) 2072-2078; DOI: https://doi.org/10.3174/ajnr.A4844
De Stefano, N.
- ADULT BRAINYou have accessA Semiautomatic Method for Multiple Sclerosis Lesion Segmentation on Dual-Echo MR Imaging: Application in a Multicenter ContextL. Storelli, E. Pagani, M.A. Rocca, M.A. Horsfield, A. Gallo, A. Bisecco, M. Battaglini, N. De Stefano, H. Vrenken, D.L. Thomas, L. Mancini, S. Ropele, C. Enzinger, P. Preziosa and M. FilippiAmerican Journal of Neuroradiology November 2016, 37 (11) 2043-2049; DOI: https://doi.org/10.3174/ajnr.A4874
Diehn, F.E.
- SPINEYou have accessDorsal Lumbar Disc Migrations with Lateral and Ventral Epidural Extension on Axial MRI: A Case Series and Review of the LiteratureM.M. Zarrabian, F.E. Diehn, A.L. Kotsenas, J.T. Wald, E. Yu and A. NassrAmerican Journal of Neuroradiology November 2016, 37 (11) 2171-2177; DOI: https://doi.org/10.3174/ajnr.A4875
Ding, Y.-H.
- INTERVENTIONALOpen AccessWall Apposition Is a Key Factor for Aneurysm Occlusion after Flow Diversion: A Histologic Evaluation in 41 RabbitsA. Rouchaud, C. Ramana, W. Brinjikji, Y.-H. Ding, D. Dai, T. Gunderson, J. Cebral, D.F. Kallmes and R. KadirvelAmerican Journal of Neuroradiology November 2016, 37 (11) 2087-2091; DOI: https://doi.org/10.3174/ajnr.A4848
Donovan, W.D.
- You have accessCurrent Procedural Terminology: History, Structure, and Relationship to Valuation for the NeuroradiologistT.M. Leslie-Mazwi, J.A. Bello, R. Tu, G.N. Nicola, W.D. Donovan, R.M. Barr and J.A. HirschAmerican Journal of Neuroradiology November 2016, 37 (11) 1972-1976; DOI: https://doi.org/10.3174/ajnr.A4863
Dousset, V.
- FELLOWS' JOURNAL CLUBSPINEOpen AccessCervical Spinal Cord DTI Is Improved by Reduced FOV with Specific Balance between the Number of Diffusion Gradient Directions and AveragesA. Crombe, N. Alberti, B. Hiba, M. Uettwiller, V. Dousset and T. TourdiasAmerican Journal of Neuroradiology November 2016, 37 (11) 2163-2170; DOI: https://doi.org/10.3174/ajnr.A4850
The authors evaluated multiple parameters of reduced-FOV DTI to optimize image quality. Fifteen healthy individuals underwent cervical spinal cord 3T MRI, including an anatomic 3D Multi-Echo Recombined Gradient Echo, high-resolution full-FOV DTI with a NEX of 3 and 20 diffusion gradient directions, and 5 sets of reduced-FOV DTIs differently balanced in terms of NEX/number of diffusion gradient directions. Qualitatively, reduced-FOV DTI sequences with a NEX of >5 were significantly better rated than the full-FOV DTI and the reduced-FOV DTI with low NEX (N=3) and a high number of diffusion gradient directions (D=20). Quantitatively, the best trade-off was reached by the reduced-FOV DTI with a NEX of 9 and 9 diffusion gradient directions. They conclude that the best compromise was obtained with a NEX of 9 and 9 diffusion gradient directions, which emphasizes the need for increasing the NEX at the expense of the number of diffusion gradient directions for spinal cord DTI, unlike brain imaging.
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