Enhanced DC Self-Navigator with Multi-Slice Signal Combination Method
Yuji Iwadate 1 , Anja C.S. Brau 2 , and Hiroyuki Kabasawa 1
Global MR Applications and Workflow, GE
Healthcare Japan, Hino, Tokyo, Japan,
MR Applications and Workflow, GE Healthcare, Munich, DE,
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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