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Abstract #3246

Temperature- and frequency-dependent dielectric properties of biological tissues for intense heating during MRI

Sherman Xuegang Xin 1,2 and Fanrui Fu 1

1 Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, China, 2 Bernard and Irene Schwartz Center for Biomedical Imaging (CBI), New York University School of Medicine, New York, New York, United States

Due to the strong dependence of tissue electrical properties on temperature, it is important to consider the potential effects of intense heating on the electromagnetic fields during MRI, as in MR-guided Focused UltraSound. Changes in tissue electrical properties during an exam may affect both efficacy of pulses designed with knowledge of B1 field distributions and the SAR pattern. Here the temperature- and frequency-dependent electric properties of porcine tissues were measured ex vivo. The obtained data can be used to calculate the electromagnetic field and SAR distribution in and around a region of heating in the MR environment.

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