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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