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Abstract #3093

Inductively Coupled Planar TX Coils: Analysis of B 1 + Efficiency and SAR Performance

Johanna Schpfer 1,2 , Klaus Huber 2 , Stephan Biber 3 , Markus Vester 3 , Sebastian Martius 2 , and Martin Vossiek 1

1 LHFT, University of Erlangen-Nuremberg, Erlangen, Germany, 2 Siemens AG, Corporate Technology, Erlangen, Germany, 3 Siemens AG, Healthcare, Erlangen, Germany

High SAR values can increase imaging time, especially if very high B1+ fields are required. In this study, potential benefits of inductively coupled planar loop antennas, designed to focus the transmit field, are evaluated and compared to the transmit characteristics of the body coil. It shows that the inserted loop leads to reduced power requirements and SAR without significantly decreasing B1+ homogeneity in the defined ROI, relative to standard excitation with the body coil.

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