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Abstract #4352

Enhanced DC Self-Navigator with Multi-Slice Signal Combination Method

Yuji Iwadate 1 , Anja C.S. Brau 2 , and Hiroyuki Kabasawa 1

1 Global MR Applications and Workflow, GE Healthcare Japan, Hino, Tokyo, Japan, 2 Global MR Applications and Workflow, GE Healthcare, Munich, DE, Germany

The self-navigator gating technique with the k-space center (DC) signal has less navigator signal deterioration than the conventional pencil-beam navigator gating when high imaging flip angles are used. We combined DC signals from the superior slices to improve respiratory motion detection in DC-based self-navigator sequence. The proposed method was tested with a 2D SPGR sequence, and it averaged DC signal fluctuations caused by spin saturation differences and cardiac motion, which resulted in improved motion detection and correction.

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