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Abstract #3878

Distortion-free, radial under-sampled fMRI with GRASP reconstruction

Chantelle Y Lim1, Yang Li1, Xirui Hou1, and Hanzhang Lu1
1Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States

Golden-angle RAdial Sparse Parallel MRI (GRASP) is a fast field echo radial acquisition with golden-angle rotation sequence used in dynamic imaging due to its motion robustness and high temporal and spatial resolution. In this study, we implemented GRASP for BOLD fMRI during visual stimulation, which yielded distortion-free images in addition to reliable activation maps and signal time-courses as compared to EPI-based fMRI. This initial feasibility study suggests that GRASP could be extended towards other parts of the brain to serve as an alternative when EPI suffers from signal distortion.

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