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Abstract #0314

Free-Breathing Radial Imaging using a Pilot-Tone RF Transmitter for Detection of Respiratory Motion

Eddy Solomon1, Thomas Vahle2, Jan Paska1, Kai Tobias Block1, Daniel K. Sodickson1, Fernando Boada1, and Hersh Chandarana1
1Radiology, New York University School of Medicine, New York, NY, United States, 2Siemens Healthcare GmbH, Erlangen, Germany

The sensitivity of MRI sequences to motion impairs their reliability and diagnostic utility for examining the chest and abdomen. Established motion-compensation techniques are not accurate enough, come at the cost of patient comfort, and are limited by the MR imaging parameters. Here, we demonstrate a novel approach that detects respiratory signal from the amplitude modulation of a transmitted RF reference signal, termed ‘pilot-tone’ (PT). We show how the use of this simple RF transmitter, with its small dimensions, high sampling rate, and low interference with the MR acquisition, can produce motion corrected-images under free-breathing conditions.

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