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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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