Abstract #1380
Comprehensive analysis of parallel transmission local SAR errors introduced by an assumed uniform density distribution
Andre Kuehne 1,2 , Sigrun Goluch 1,2 , Ewald Moser 1,2 , and Elmar Laistler 1,2
1
Center for Medical Physics and Biomedical
Engineering, Medical University of Vienna, Vienna,
Vienna, Austria,
2
MR
Center of Excellence, Medical University of Vienna,
Vienna, Vienna, Austria
In this work, the validity of the commonly made
assumption of an isotropic tissue density (1000 kg/m)
for SAR calculations is investigated. SAR matrix
Eigenvalues- and vectors of an 8-channel head array for
7T MRI are compared and a statistical analysis
performed. It is found, that the simplified SAR
distribution leads to an overestimation of local SAR by
11-12% on average.
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