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Abstract #2736

RF Coil Local Power Deposition and Efficiency Evaluation Using a Phantom with High Sensitivity to Temperature Change

Leeor Alon1, 2, Assf Tal1, Cem Murat Deniz1, 2, Gene Young Cho1, 2, Daniel Sodickson1, 2, Yudong Zhu1, 2

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

Local specific absorption rate (SAR) quantification is important in order to ensure safety with regard to RF exposure. In this work, we used paramagnetic lanthanide complexes (TMDOTA-) to increase the sensitivity of the phantom to temperature change. The use of this phantom enabled absolute temperature measurement at a high accuracy and since the phantom was sensitive to temperature change, it enabled the accurate mapping temperature change due to smaller RF pulse exposures compared to previously shown studies. In conjunction with B1 mapping this phantom enables the local calculation of the RF coil efficiency metric.

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Keywords

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