Abstract #0619

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

Eugene Milshteyn^1,2, Georgy Guryev³, Angel Torrado-Carvajal^1,2,4, Jacob K. White³, Lawrence L. Wald^1,2,5, and Bastien Guerin^1,2

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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