Index by author
Quarles, C.C.
- EDITOR'S CHOICEAdult BrainOpen AccessMoving Toward a Consensus DSC-MRI Protocol: Validation of a Low–Flip Angle Single-Dose Option as a Reference Standard for Brain TumorsK.M. Schmainda, M.A. Prah, L.S. Hu, C.C. Quarles, N. Semmineh, S.D. Rand, J.M. Connelly, B. Anderies, Y. Zhou, Y. Liu, B. Logan, A. Stokes, G. Baird and J.L. BoxermanAmerican Journal of Neuroradiology April 2019, 40 (4) 626-633; DOI: https://doi.org/10.3174/ajnr.A6015
DSC-MR imaging using preload, intermediate (60°) flip angle and postprocessing leakage correction has gained traction as a standard methodology. Simulations suggest that DSC-MR imaging with flip angle = 30° and no preload yields relative CBV practically equivalent to the reference standard. Eighty-four patients with brain lesions were enrolled in this 3-institution study. Forty-three patients satisfied the inclusion criteria. DSC-MR imaging (3T, single-dose gadobutrol, gradient recalled-echo–EPI, TE=20–35 ms, TR=1.2–1.63 seconds) was performed twice for each patient, with flip angle = 30°–35° and no preload (P-) or provided preload (P+) for an intermediate flipangle = 60°. Compared with 60°/P+/C+, 30°/P-/C+ had closest mean standardized relative CBV, highest Lin concordance correlation coefficient, and lowest Bland-Altman bias.
Qureshi, A.M.
- PediatricsYou have accessDeterminants of Radiation Dose in Selective Ophthalmic Artery Chemosurgery for RetinoblastomaA.M. Qureshi, L.K. Davies, P.A. Patel, A. Rennie and F. RobertsonAmerican Journal of Neuroradiology April 2019, 40 (4) 713-717; DOI: https://doi.org/10.3174/ajnr.A6000