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Abstract #4182

Determination of local SAR through MR Thermometry at 7T

Ignacio Gonzalez Insua1, Rene Gumbrecht1, Karsten Wicklow1, and Jonathan R Polimeni2,3

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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