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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