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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