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Abstract #2459

High Temporal Resolution 3D Motion Correction of MP-RAGE with Cylindrical Sampling and Parallel Reconstruction

Wei Lin1, Qin Qin2, 3, Feng Huang1, Randy Duensing1

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

A self-navigated method for motion correction in multicoil imaging applications, involving both data collection and reconstruction, is presented. The cylindrical k-space is collected using multiple pairs of orthogonal view planes with a bit-reversed radial angle ordering scheme. A rapid self-calibrated parallel imaging method, generalized GRAPPA Operator for Wider readout Lines (GROWL), facilitates both motion detection and image reconstruction. Full 3D rigid-body motion detection is achieved at a temporal resolution of every two consecutive view planes (2-6 seconds). The efficacy of the proposed technique is demonstrated in healthy volunteers using a magnetization-prepared rapid gradient echo (MP-RAGE) sequence.