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Abstract #4055

Simulation of Focused RF Heating using a High-Channel-Count RF Array and a Maximum SAR Algorithm 

Koray Ertan1,2, Joshua De Bever1, Mihir Pendse1, Paolo Decuzzi2, and Brian Rutt1
1Department of Radiology, Stanford University, Stanford, CA, United States, 2Italian Institute of Technology, Genoa, Italy

A 70-channel parallel transmit RF coil array intended for focused RF applications was designed and simulated at four frequencies (298 MHz, 447 MHz, 900 MHz and 1200 MHz) using a Ella body model. A previously proposed maxSAR algorithm was used to focus SAR in target regions while limiting the SAR in background tissues. Spatial maps of optimized SAR distribution are shown for several target locations and all frequencies. SAR distributions together with temperature and CEM43 maps suggest that clinical levels of focused hyperthermia can be achieved using high channel count parallel transmit RF coils and the maxSAR algorithm.

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