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Abstract #2644

Numerical Simulation of Specific Absorption Rate (SAR) Induced in the Head as a Function of EEG Lead Conductivity during 256-channel dEEG/fMRI at 3T.

Seyed Reza Atefi1,2, Peter Serano3, Catherine Poulsen4, and Giorgio Bonmassar1,2

1Harvard Medical School, Boston, MA, United States, 2Massachusetts General Hospital, Boston, MA, United States, 3Mechanical Engineering, University of Maryland, MD, United States, 4Electrical Geodesics Inc., OR, United States

This study presents the numerical quantification of the relationship between the EEG lead conductivity and SAR induced in the head in EEG-fMRI at 3T and using a 256-channel dense array sensor net. SAR induced in the head normalized by the gold standard of no sensor net was an S-curve function of the EEG lead conductivity in the range 1S/m - 5.8.107 S/m, plateauing at 1 for lead conductivities below 10 S/m.

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