Index by author
Guillevin, R.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessAdded Value of Spectroscopy to Perfusion MRI in the Differential Diagnostic Performance of Common Malignant Brain TumorsA. Vallée, C. Guillevin, M. Wager, V. Delwail, R. Guillevin and J.-N. ValléeAmerican Journal of Neuroradiology August 2018, 39 (8) 1423-1431; DOI: https://doi.org/10.3174/ajnr.A5725
From January 2013 to January 2016, fifty-five consecutive patients with histopathologically proved lymphomas, glioblastomas, and metastases were included in this study after undergoing MR imaging. The perfusion parameters (maximum relative CBV, maximum percentage of signal intensity recovery) and spectroscopic concentration ratios (lactate/Cr, Cho/NAA, Cho/Cr, and lipids/Cr) were analyzed individually and in optimal combinations. The highest differential diagnostic performance was obtained with the following combined classifiers: 1) maximum percentage of signal intensity recovery-Cho/NAA to discriminate lymphomas from glioblastomas and metastases; 2) relative CBV-Cho/NAA to discriminate glioblastomas from lymphomas and metastases; and 3) maximum percentage of signal intensity recovery-lactate/Cr and maximum percentage of signal intensity recovery-Cho/Cr to discriminate metastases from lymphomas and glioblastomas. The authors conclude that spectroscopy yielded an added performance value to perfusion using optimal combined classifiers of these modalities.
Gujar, S.K.
- FELLOWS' JOURNAL CLUBFunctionalYou have accessPreoperative Mapping of the Supplementary Motor Area in Patients with Brain Tumor Using Resting-State fMRI with Seed-Based AnalysisJ. Wongsripuemtet, A.E. Tyan, A. Carass, S. Agarwal, S.K. Gujar, J.J. Pillai and H.I. SairAmerican Journal of Neuroradiology August 2018, 39 (8) 1493-1498; DOI: https://doi.org/10.3174/ajnr.A5709
Sixty-six patients with brain tumors were evaluated with resting-state fMRI using seed-based analysis of hand and orofacial motor regions. Rates of supplementary motor area localization were compared with those in healthy controls and with localization results by task-based fMRI. Localization of the supplementary motor area using hand motor seed regions was more effective than seeding using orofacial motor regions for both patients with brain tumor and controls. Bilateral hand motor seeding was superior to unilateral hand motor seeding in patients with brain tumor for either side. The authors conclude that in addition to task-based fMRI, seed-based analysis of resting-state fMRI represents an equally effective method for supplementary motor area localization in patients with brain tumors, with the best results obtained with bilateral hand motor region seeding.
Hajnal, J.V.
- PediatricsOpen AccessNeurodevelopmental Correlates of Fetal Motor Behavior Assessed Using Cine MR ImagingT.T.A. Hayat, M. Martinez-Biarge, V. Kyriakopoulou, J.V. Hajnal and M.A. RutherfordAmerican Journal of Neuroradiology August 2018, 39 (8) 1519-1522; DOI: https://doi.org/10.3174/ajnr.A5694
Hakim, A.
- LetterYou have accessAnother Important Pitfall in the Diagnosis of Dural Sinus Thrombosis in NeonatesA. Hakim and F. WagnerAmerican Journal of Neuroradiology August 2018, 39 (8) E92; DOI: https://doi.org/10.3174/ajnr.A5674
Haller, S.
- EDITOR'S CHOICEAdult BrainOpen AccessBrain Perfusion Measurements Using Multidelay Arterial Spin-Labeling Are Systematically Biased by the Number of DelaysM. van der Thiel, C. Rodriguez, P. Giannakopoulos, M.X. Burke, R. Marc Lebel, N. Gninenko, D. Van De Ville and S. HallerAmerican Journal of Neuroradiology August 2018, 39 (8) 1432-1438; DOI: https://doi.org/10.3174/ajnr.A5717
The authors assessed delay and transit time-uncorrected and transit time-corrected CBF maps in 87 healthy controls. Data analysis included voxelwise permutation-based between-sequence comparisons of 3-delay versus 7-delay, within-sequence comparison of transit time-uncorrected versus transit time-corrected maps, and average CBF calculations in regions that have been shown to differ. The 7-delay sequence estimated a higher CBF value than the 3-delay for the transit time-uncorrected and transit time-corrected maps in regions corresponding to the watershed areas. In the peripheral regions of the brain, the estimated delay was found to be longer for the 3-delay sequence while the inverse was found in the center of the brain. This study supports the necessity of standardizing acquisition parameters in multidelay arterial spin-labeling and identifying basic parameters as a confounding factor in CBF quantification studies.
Hanagandi, P.
- PediatricsYou have accessArterial Spin-Labeling in Children with Brain Tumor: A Meta-AnalysisA.F. Delgado, F. De Luca, P. Hanagandi, D. van Westen and A.F. DelgadoAmerican Journal of Neuroradiology August 2018, 39 (8) 1536-1542; DOI: https://doi.org/10.3174/ajnr.A5727
Hayashi, R.
- LetterYou have accessReply:H. Kuno, O. Sakai and R. HayashiAmerican Journal of Neuroradiology August 2018, 39 (8) E98; DOI: https://doi.org/10.3174/ajnr.A5756
Hayat, T.T.A.
- PediatricsOpen AccessNeurodevelopmental Correlates of Fetal Motor Behavior Assessed Using Cine MR ImagingT.T.A. Hayat, M. Martinez-Biarge, V. Kyriakopoulou, J.V. Hajnal and M.A. RutherfordAmerican Journal of Neuroradiology August 2018, 39 (8) 1519-1522; DOI: https://doi.org/10.3174/ajnr.A5694
Herzka, D.A.
- SpineYou have accessDetection of the Stellate and Thoracic Sympathetic Chain Ganglia with High-Resolution 3D-CISS MR ImagingA. Chaudhry, A. Kamali, D.A. Herzka, K.C. Wang, J.A. Carrino and A.M. BlitzAmerican Journal of Neuroradiology August 2018, 39 (8) 1550-1554; DOI: https://doi.org/10.3174/ajnr.A5698
Hosseini, Z.
- Adult BrainOpen AccessMorphology-Specific Discrimination between MS White Matter Lesions and Benign White Matter Hyperintensities Using Ultra-High-Field MRIZ. Hosseini, J. Matusinec, D.A. Rudko, J. Liu, B.Y.M. Kwan, F. Salehi, M. Sharma, M. Kremenchutzky, R.S. Menon and M. DrangovaAmerican Journal of Neuroradiology August 2018, 39 (8) 1473-1479; DOI: https://doi.org/10.3174/ajnr.A5705
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