Index by author
Scott, A.O.
- EDITOR'S CHOICEFunctionalOpen AccessInterrogating the Functional Correlates of Collateralization in Patients with Intracranial Stenosis Using Multimodal Hemodynamic ImagingB.A. Roach, M.J. Donahue, L.T. Davis, C.C. Faraco, D. Arteaga, S.-C. Chen, T.R. Ladner, A.O. Scott and M.K. StrotherAmerican Journal of Neuroradiology June 2016, 37 (6) 1132-1138; DOI: https://doi.org/10.3174/ajnr.A4758
The authors assessed correlations among baseline perfusion and arterial transit time artifacts, cerebrovascular reactivity, and the presence of collateral vessels on digital subtraction angiography. Arterial spin-labeling MRI and DSA were compared with BOLD MR imaging measures of hypercapnic cerebrovascular reactivity in 18 patients with symptomatic intracranial stenosis. In regions with normal-to-high signal on ASL, collateral vessel presence on DSA strongly correlated with declines in cerebrovascular reactivity (as measured on BOLD MRI). These data support the use of ASL MR imaging rather than invasive DSA to assess the presence of collateralization, even for patients with internal carotid stenosis from nonatherosclerotic etiologies. Also, collaterals identified on ASL with arterial transit artifacts correlated with decreased CVR compared with regions not perfused via collaterals.
Shah, C.C.
- Head and Neck ImagingYou have accessRadiation Dose Reduction by Indication-Directed Focused z-Direction Coverage for Neck CTA.K. Parikh and C.C. ShahAmerican Journal of Neuroradiology June 2016, 37 (6) 985-989; DOI: https://doi.org/10.3174/ajnr.A4672
Shams, S.
- Adult BrainOpen AccessIncidence of Radiologically Isolated Syndrome: A Population-Based StudyY. Forslin, T. Granberg, A. Antwan Jumah, S. Shams, P. Aspelin, M. Kristoffersen-Wiberg, J. Martola and S. FredriksonAmerican Journal of Neuroradiology June 2016, 37 (6) 1017-1022; DOI: https://doi.org/10.3174/ajnr.A4660
- EDITOR'S CHOICEAdult BrainOpen AccessClinical Feasibility of Synthetic MRI in Multiple Sclerosis: A Diagnostic and Volumetric Validation StudyT. Granberg, M. Uppman, F. Hashim, C. Cananau, L.E. Nordin, S. Shams, J. Berglund, Y. Forslin, P. Aspelin, S. Fredrikson and M. Kristoffersen-WibergAmerican Journal of Neuroradiology June 2016, 37 (6) 1023-1029; DOI: https://doi.org/10.3174/ajnr.A4665
SyMRI is a quantitative synthetic MR imaging method where a single saturation recovery TSE sequence is used to estimate the proton density, longitudinal relaxation rate, and transverse relaxation rate and allows for a free range of synthetic weightings. Twenty patients with MS and 20 healthy controls were enrolled and synthetic MR imaging was implemented on a Siemens 3T scanner. Diagnostic accuracy, lesion detection, and artifacts were assessed by blinded neuroradiologic evaluation, and CNR by manual tracing. Synthetic PD-, T1-, and T2-weighted images were of sufficient or good quality and were acquired in 7% less time than with conventional MRI. Synthetic FLAIR images suffered from artifacts. Also, synthetic MRI provided segmentations with the shortest processing time (16 seconds) and the lowest repeatability error for brain volume. Synthetic MRI can be an alternative to conventional MRI for generating diagnostic PD-, T1-, and T2-weighted images in patients with MS with fast and robust volumetric measurements.
Shepherd, T.M.
- FELLOWS' JOURNAL CLUBAdult BrainOpen AccessNew Clinically Feasible 3T MRI Protocol to Discriminate Internal Brain Stem AnatomyM.J. Hoch, S. Chung, N. Ben-Eliezer, M.T. Bruno, G.M. Fatterpekar and T.M. ShepherdAmerican Journal of Neuroradiology June 2016, 37 (6) 1058-1065; DOI: https://doi.org/10.3174/ajnr.A4685
Track density imaging (TDI) is a novel MR imaging postprocessing technique based on high angular-resolution diffusion acquisitions that generate super-resolution images derived by whole-brain probabilistic streamline tractography. TDI and echo modulation curve T2 mapping were combined with simultaneous multisection acquisition to reveal anatomic detail at 7 canonical levels of the brain stem. Compared with conventional MR imaging contrasts, many individual brain stem tracts and nuclear groups were directly visualized for the first time at 3T.
Sherr, E.H.
- Pediatric NeuroimagingOpen AccessRelationship between M100 Auditory Evoked Response and Auditory Radiation Microstructure in 16p11.2 Deletion and Duplication CarriersJ.I. Berman, D. Chudnovskaya, L. Blaskey, E. Kuschner, P. Mukherjee, R. Buckner, S. Nagarajan, W.K. Chung, E.H. Sherr and T.P.L. RobertsAmerican Journal of Neuroradiology June 2016, 37 (6) 1178-1184; DOI: https://doi.org/10.3174/ajnr.A4687
Shin, J.H.
- Head and Neck ImagingYou have accessModified Core Biopsy Technique to Increase Diagnostic Yields for Well-Circumscribed Indeterminate Thyroid Nodules: A Retrospective AnalysisS. Han, J.H. Shin, S.Y. Hahn and Y.L. OhAmerican Journal of Neuroradiology June 2016, 37 (6) 1155-1159; DOI: https://doi.org/10.3174/ajnr.A4650
Sondhi, D.
- Pediatric NeuroimagingOpen AccessBrain Region–Specific Degeneration with Disease Progression in Late Infantile Neuronal Ceroid Lipofuscinosis (CLN2 Disease)J.P. Dyke, D. Sondhi, H.U. Voss, K. Yohay, C. Hollmann, D. Mancenido, S.M. Kaminsky, L.A. Heier, K.D. Rudser, B. Kosofsky, B.J. Casey, R.G. Crystal and D. BallonAmerican Journal of Neuroradiology June 2016, 37 (6) 1160-1169; DOI: https://doi.org/10.3174/ajnr.A4669
Steenwijk, M.D.
- Adult BrainYou have accessWhite Matter Diffusion Changes during the First Year of Natalizumab Treatment in Relapsing-Remitting Multiple SclerosisO.T. Wiebenga, M.M. Schoonheim, H.E. Hulst, G.J.A. Nagtegaal, E.M.M. Strijbis, M.D. Steenwijk, C.H. Polman, P.J.W. Pouwels, F. Barkhof and J.J.G. GeurtsAmerican Journal of Neuroradiology June 2016, 37 (6) 1030-1037; DOI: https://doi.org/10.3174/ajnr.A4690
Strijbis, E.M.M.
- Adult BrainYou have accessWhite Matter Diffusion Changes during the First Year of Natalizumab Treatment in Relapsing-Remitting Multiple SclerosisO.T. Wiebenga, M.M. Schoonheim, H.E. Hulst, G.J.A. Nagtegaal, E.M.M. Strijbis, M.D. Steenwijk, C.H. Polman, P.J.W. Pouwels, F. Barkhof and J.J.G. GeurtsAmerican Journal of Neuroradiology June 2016, 37 (6) 1030-1037; DOI: https://doi.org/10.3174/ajnr.A4690
Strother, M.K.
- EDITOR'S CHOICEFunctionalOpen AccessInterrogating the Functional Correlates of Collateralization in Patients with Intracranial Stenosis Using Multimodal Hemodynamic ImagingB.A. Roach, M.J. Donahue, L.T. Davis, C.C. Faraco, D. Arteaga, S.-C. Chen, T.R. Ladner, A.O. Scott and M.K. StrotherAmerican Journal of Neuroradiology June 2016, 37 (6) 1132-1138; DOI: https://doi.org/10.3174/ajnr.A4758
The authors assessed correlations among baseline perfusion and arterial transit time artifacts, cerebrovascular reactivity, and the presence of collateral vessels on digital subtraction angiography. Arterial spin-labeling MRI and DSA were compared with BOLD MR imaging measures of hypercapnic cerebrovascular reactivity in 18 patients with symptomatic intracranial stenosis. In regions with normal-to-high signal on ASL, collateral vessel presence on DSA strongly correlated with declines in cerebrovascular reactivity (as measured on BOLD MRI). These data support the use of ASL MR imaging rather than invasive DSA to assess the presence of collateralization, even for patients with internal carotid stenosis from nonatherosclerotic etiologies. Also, collaterals identified on ASL with arterial transit artifacts correlated with decreased CVR compared with regions not perfused via collaterals.
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