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Abstract #0619

Approaching Real-Time Patient-Specific SAR Calculation for Parallel Transmission at 7 Tesla

Eugene Milshteyn1,2, Georgy Guryev3, Angel Torrado-Carvajal1,2,4, Jacob K. White3, Lawrence L. Wald1,2,5, and Bastien Guerin1,2
1Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States, 2Harvard Medical School, Boston, MA, United States, 3Dept. of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, 4Medical Image Analysis and Biometry Laboratory, Universidad Rey Juan Carlos, Madrid, Spain, 5Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, United States

Current parallel transmission protocols have conservative safety limits due to offline simulations of generic body models. Instead, a personalized medicine approach should be used, whereby the patient-specific SAR is calculated as the patient lies on the table. In this way, more accurate, and hopefully less conservative safety limits can be employed. In this study, we develop a fast methodology for patient-specific SAR calculations with an 8 channel pTx head coil at 7T. We show a real-time approach in 6 volunteers for scanning the patient, segmenting the body, and performing an electromagnetic simulation in order to generate the local SAR maps.

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