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Abstract #1479

SALSAS: Spectral Spatial Excitation Combined with Z-Shimming to Mitigate Through-Plane Signal Loss in Single-Slice and Multiband Gradient Echo Imaging

Anuj Sharma 1 , Manus Donahue 2,3 , V. Andrew Stenger 4 , and William A. Grissom 1,2

1 Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 2 Radiology, Vanderbilt University, TN, United States, 3 Psychiatry, Vanderbilt University, TN, United States, 4 Medicine, University of Hawaii, HI, United States

An SNR-efficient method to mitigate signal loss artifacts in single-slice and simultaneous multi-slice long echo time gradient echo acqisitions is presented. Signal improvement comes from the use of spectral spatial pulses to selectively excite regions that are refocused with Z-shim. Scan time is minimized by treating the different z-shim acquisitions as additional slices in a multi-slice stack. Phantom and in-vivo experiments at 7T and 3T demonstrate the effectiveness of the proposed method in reducing signal loss artifacts in both single-slice and multiband exams.

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