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Abstract #4910

Rapid, Direct Measurement of Bulk RF Power Deposition using Free Induction Decay Acquisitions

Leeor Alon 1,2 , Assaf Tal 1,2 , Giuseppe Carluccio 1,2 , Cem M. Deniz 1,2 , Karthik Lakshmanan 1,2 , Daniel K. Sodickson 1,2 , and Christopher C. Collins 1,2

1 Department of Radiology, Bernard and Irene Schwartz Center for Biomedical Imaging, New York University School of Medicine, New York, NY, United States, 2 Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, United States

Whole body and partial body RF power deposition is typically monitored by estimating the RF power delivered to the patient in the scanner. In practice however, some portion of the energy gets deposited in the transmit chain and coil electronics and different subjects couple to the coil differently so that the RF power deposited into the patient may be overestimated. In this work, we utilize a single excitation pulse and acquire a single FID before and after exposure to SAR to measure the RF thermal energy change. Results are shown for phantom and in-vivo heating experiments.

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