Abstract #4182

Determination of local SAR through MR Thermometry at 7T

Ignacio Gonzalez Insua¹, Rene Gumbrecht¹, Karsten Wicklow¹, and Jonathan R Polimeni^2,3

¹Siemens Healthineers, Erlangen, Germany, ²Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, ³Department of Radiology, Harvard Medical School, Boston, MA, United States

MR thermometry at 7T allows the straight forward acquisition of temperature maps with very high spatio-temporal resolution. This sensitive method at ultra high fields (UHF) allows the acquisition of local SAR distribution in a tissue equivalent gel head phantom. Using a 1mm isotropic resolution, 5s sampling rate and <0.04°C accuracy in temperature we are able to assess the MR safety of RF coils and validate the underlying electromagnetic and thermal simulations.

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