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Abstract #1856

Silent Navigator with Whole Volume Excitation

Yuji Iwadate1, Atsushi Nozaki1, Yoshinobu Nunokawa2, Shigeo Okuda3, Masahiro Jinzaki3, and Hiroyuki Kabasawa1

1Global MR Applications and Workflow, GE Healthcare Japan, Hino, Tokyo, Japan, 2Department of Radiation Technology, Keio University Hospital, Tokyo, Japan, 3Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan

The conventional pencil-beam navigator suffers from large acoustic noise due to oscillating gradient pulses during RF excitation. We developed a silent navigator technique with whole volume excitation (vNav). The vNav technique reduced acoustic noise to almost the same level as background. In volunteer scan, a waveform of vNav was well correlated with the bellows signal, and motion reduction was demonstrated in 3D-SPGR imaging. The vNav integration into the silent imaging sequence should be examined in the next step.

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