Index by author
Nagi, S.
- Adult BrainYou have accessMultinodular and Vacuolating Posterior Fossa Lesions of Unknown SignificanceA. Lecler, J. Bailleux, B. Carsin, H. Adle-Biassette, S. Baloglu, C. Bogey, F. Bonneville, E. Calvier, P.-O. Comby, J.-P. Cottier, F. Cotton, R. Deschamps, C. Diard-Detoeuf, F. Ducray, L. Duron, C. Drissi, M. Elmaleh, J. Farras, J.A. Garcia, E. Gerardin, S. Grand, D.C. Jianu, S. Kremer, N. Magne, M. Mejdoubi, A. Moulignier, M. Ollivier, S. Nagi, M. Rodallec, J.-C. Sadik, N. Shor, T. Tourdias, C. Vandendries, V. Broquet and J. Savatovsky for the ENIGMA Investigation Group (EuropeaN Interdisciplinary Group for MVNT Analysis)American Journal of Neuroradiology October 2019, 40 (10) 1689-1694; DOI: https://doi.org/10.3174/ajnr.A6223
Nagpal, S.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessPerfusion MRI-Based Fractional Tumor Burden Differentiates between Tumor and Treatment Effect in Recurrent Glioblastomas and Informs Clinical Decision-MakingM. Iv, X. Liu, J. Lavezo, A.J. Gentles, R. Ghanem, S. Lummus, D.E. Born, S.G. Soltys, S. Nagpal, R. Thomas, L. Recht and N. FischbeinAmerican Journal of Neuroradiology October 2019, 40 (10) 1649-1657; DOI: https://doi.org/10.3174/ajnr.A6211
Forty-seven patients with high-grade gliomas (primarily glioblastoma) with recurrent contrast-enhancing lesions on DSC-MR imaging were retrospectively evaluated after surgical sampling. Histopathologic examination defined treatment effect versus tumor. Normalized relative CBV thresholds of 1.0 and 1.75 were used to define low, intermediate, and high fractional tumor burden classes in each histopathologically defined group. Performance was assessed with an area under the receiver operating characteristic curve. Mean low fractional tumor burden, high fractional tumor burden, and relative CBV of the contrast-enhancing volume were significantly different between treatment effect and tumor with tumor having significantly higher fractional tumor burden and relative CBV and lower fractional tumor burden. High fractional tumor burden and low fractional tumor burden define fractions of the contrast-enhancing lesion volume with high and low blood volume, respectively, and can differentiate treatment effect from tumor in recurrent glioblastomas. Fractional tumor burden maps can also help to inform clinical decision-making.
Nasr, D.M.
- Extracranial VascularYou have accessCarotid Artery Tortuosity Is Associated with Connective Tissue DiseasesJ.P. Welby, S.T. Kim, C.M. Carr, V.T. Lehman, C.H. Rydberg, J.T. Wald, P.H. Luetmer, D.M. Nasr and W. BrinjikjiAmerican Journal of Neuroradiology October 2019, 40 (10) 1738-1743; DOI: https://doi.org/10.3174/ajnr.A6218
Nathan, M.A.
- FELLOWS' JOURNAL CLUBSpineYou have accessComparison of [18F] FDG-PET/MRI and Clinical Findings for Assessment of Suspected Lumbar Facet Joint Pain: A Prospective Study to Characterize Candidate Nonanatomic Imaging Biomarkers and Potential Impact on ManagementV.T. Lehman, F.E. Diehn, S.M. Broski, M.A. Nathan, B.J. Kemp, N.B. Larson, R.A. Shelerud, J.S. Brault, M.P. Halasy and T.P. MausAmerican Journal of Neuroradiology October 2019, 40 (10) 1779-1785; DOI: https://doi.org/10.3174/ajnr.A6224
Ten patients with clinically suspected facetogenic low back pain were prospectively recruited with a designation of specific facet joints implicated clinically. Subsequently, patients underwent an FDG-PET/MR imaging examination with gadolinium. Each facet joint was graded for perifacet signal change on MR imaging and FDG activity. The frequency and correlation of MR imaging, FDG-PET, and clinical findings were determined. There was low concordance of perifacet signal change and FDG activity with clinically implicated facet joints. This could indicate either the potential to change patient management or a lack of biomarker accuracy.
Neuhaus, V.
- Patient SafetyYou have accessVirtual Monoenergetic Images from Spectral Detector CT Enable Radiation Dose Reduction in Unenhanced Cranial CTR.P. Reimer, D. Flatten, T. Lichtenstein, D. Zopfs, V. Neuhaus, C. Kabbasch, D. Maintz, J. Borggrefe and N. Große HokampAmerican Journal of Neuroradiology October 2019, 40 (10) 1617-1623; DOI: https://doi.org/10.3174/ajnr.A6220
Nicola, G.N.
- EDITOR'S CHOICEYou have accessBoard Certification Characteristics of Practicing NeuroradiologistsA.B. Rosenkrantz, G.N. Nicola, J.A. Hirsch and R. DuszakAmerican Journal of Neuroradiology October 2019, 40 (10) 1610-1616; DOI: https://doi.org/10.3174/ajnr.A6225
Of 3769 included radiologists ever subspecialty certified, 84.1% are currently subspecialty certified. Of 1777/3769 radiologists ever subspecialty-certified and with lifetime primary certificates, only 66.6% are currently subspecialty certified. Of 3341 included most-practice neuroradiologists (>50% clinical work effort in neuroradiology based on work relative value unit–weighted national Medicare claims), 73.0% were ever subspecialty certified; of these, 89.1% are currently subspecialty certified. More than one-quarter of most-practice neuroradiologists never obtained neuroradiology subspecialty certification. Even when initially obtained, that certification is commonly not maintained, particularly by lifetime primary certificate diplomates and those in nonacademic and smaller practices.
Nicolini, E.
- Adult BrainYou have accessEmpty Sella Is a Sign of Symptomatic Lateral Sinus Stenosis and Not Intracranial HypertensionA. Zetchi, M.-A. Labeyrie, E. Nicolini, M. Fantoni, M. Eliezer and E. HoudartAmerican Journal of Neuroradiology October 2019, 40 (10) 1695-1700; DOI: https://doi.org/10.3174/ajnr.A6210
Niu, R.-N.
- InterventionalOpen AccessApplication of High-Resolution C-Arm CT Combined with Streak Metal Artifact Removal Technology for the Stent-Assisted Embolization of Intracranial AneurysmsT.-F. Li, J. Ma, X.-W. Han, P.-J. Fu, R.-N. Niu, W.-Z. Luo and J.-Z. RenAmerican Journal of Neuroradiology October 2019, 40 (10) 1752-1758; DOI: https://doi.org/10.3174/ajnr.A6190
Ollivier, M.
- Adult BrainYou have accessMultinodular and Vacuolating Posterior Fossa Lesions of Unknown SignificanceA. Lecler, J. Bailleux, B. Carsin, H. Adle-Biassette, S. Baloglu, C. Bogey, F. Bonneville, E. Calvier, P.-O. Comby, J.-P. Cottier, F. Cotton, R. Deschamps, C. Diard-Detoeuf, F. Ducray, L. Duron, C. Drissi, M. Elmaleh, J. Farras, J.A. Garcia, E. Gerardin, S. Grand, D.C. Jianu, S. Kremer, N. Magne, M. Mejdoubi, A. Moulignier, M. Ollivier, S. Nagi, M. Rodallec, J.-C. Sadik, N. Shor, T. Tourdias, C. Vandendries, V. Broquet and J. Savatovsky for the ENIGMA Investigation Group (EuropeaN Interdisciplinary Group for MVNT Analysis)American Journal of Neuroradiology October 2019, 40 (10) 1689-1694; DOI: https://doi.org/10.3174/ajnr.A6223
Parker, D.L.
- Adult BrainOpen AccessEffect of Time Elapsed since Gadolinium Administration on Atherosclerotic Plaque Enhancement in Clinical Vessel Wall MR Imaging StudiesA. de Havenon, H.J. Muhina, D.L. Parker, J.S. McNally and M.D. AlexanderAmerican Journal of Neuroradiology October 2019, 40 (10) 1709-1711; DOI: https://doi.org/10.3174/ajnr.A6191