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Abstract #3213

Local SAR elevations in the human head induced by high-permittivity pads at 7 Tesla

Thomas M Fiedler 1 , Mark E Ladd 1,2 , and Andreas K Bitz 1

1 Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2 Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany

It has been shown that specific configurations of high-permittivity pads can lead to an increase of local SAR. The electric field distribution depends on several parameters, e.g. polarization and distribution of the incident field, tissue distribution, and the actual geometry and position of the pad as well as its permittivity. In this work, we investigate several combinations of these parameters by RF field simulations in two body models and with two excitation scenarios to determine under which conditions SAR elevations are likely to occur or can be avoided.

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