Abstract #3233
RF safety assessment of a bilateral 4-channel Tx/Rx 7T breast coil
Thomas M Fiedler 1 , Aaron S Kujawa 1 , Frank Resmer 2 , Patrick Stein 2 , Titus Lanz 2 , Mark E Ladd 1,3 , and Andreas K Bitz 1
1
Medical Physics in Radiology, German Cancer
Research Center (DKFZ), Heidelberg, Germany,
2
RAPID
Biomedical GmbH, Rimpar, Bavaria, Germany,
3
Erwin
L. Hahn Institute for Magnetic Resonance Imaging,
University Duisburg-Essen, Essen, Germany
Numerical simulations for a bilateral 4-channel
transmit/receive breast coil were performed to
investigate the optimum excitation mode of the coil and
to determine the maximum permissible input power. An
exact model of the breast coil was generated and
validated by a comparison of measured and simu-lated B1+
distributions in a phantom. An anatomical heterogeneous
body model was used to obtain realistic specific
absorption rates (SAR). B1+ shimming was performed to
find an excitation mode with optimal B1+ homogeneity.
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