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Abstract #1873

Faster B1 Field and SAR Estimation in Parallel Transmit Arrays without Tuning using Voltage Sources

Hongbae Jeong 1 , Konstantinos Papoutsis 1 , Peter Jezzard 1 , and Aaron T. Hess 2

1 FMRIB Centre, University of Oxford, Oxford, Oxfordshire, United Kingdom, 2 Department of Cardiovascular Medicine, University of Oxford, Oxford, Oxfordshire, United Kingdom

In ultra-high-field magnetic resonance imaging, there are two specific needs for EM simulation: one is the estimation of transmit and receive magnetic field distributions and the other is the estimation of specific absorption rate. In this study, we compare and evaluate two methods of simulating an eight channel parallel transmit transceiver coil via generated B1+ fields and SAR distribution in a 7T cylindrical phantom and human head model. Method 1 is the conventional tuning method whereby one voltage source is placed on each element and manually tuned using explicit capacitor values and Method 2 only uses voltage sources.

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