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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