Meeting Banner
Abstract #3750

Fast, Robust and Self-Navigated 3D Cylindrical Imaging: MP-RAGE and FLAIR

Wei Lin1, Qin Qin2, 3, Stewart H. Mostofsky4, George Randy Duensing1

1Invivo Corporation, Philips Healthcare, Gainesville, FL, United States; 2Radiology, The Johns Hopkins University, Baltimore, MD, United States; 3F.M. Kirby Research Center, Kennedy Krieger Institute, Baltimore, MD, United States; 4Neurology and Psychiatry, The Johns Hopkins University, Baltimore, MD, United States

A fast, robust and self-navigated 3D imaging method is proposed, based on sampling k-space with pairs of orthogonal view planes forming a cylinder. Rotation around its main axis is corrected in real-time, while other motions are corrected retrospectively at a temporal resolution of every 1-2 second. The method achieves the same off-resonance behavior and reconstruction speed as the conventional 3D Cartesian imaging. When array coil is used, scan time can be reduced significantly by acquiring less view planes. The efficacy of the proposed technique is demonstrated in healthy volunteers using a T1-weighted MP-RAGE sequence and a T2-weighted FLAIR sequence.

Abstract PDF Presentation Video

Keywords

accelerated acceleration achieved achieves acquisition acquisitions additional allowing always applications applying approaches appropriate arbitrary around array artifacts asked attached attenuated axis azimuthally beginning behavior blurring body central channel circle clinical coil combined combining common computed constraints corrected correction correlating correlation corrupted coverage cylinder cylindrical degree degrees delay derived detected discomfort eddy efficacy either encode entire fast final five flair fluid form forming freedom full ghosts gradient grid head healthy immune institute interval introduce introduces inversion johns longer magnetization major make makes many marker matrix midway modified motion navigated navigator navigators nearby neurology nodding often orthogonal pairs parallel prepared previously prior projection prolong proposed psychiatry pulse radial radiology rage randy rapid readout real reconstruction recovery reducing reformatting removed repetitively require resolution retrospective retrospectively rigid rotation sampling scanned scanner secs self shaking sharpness shearing significantly slice slices space speed strategy streaks subject successive takes temporal thinner train translation view volume volunteer volunteers white