Intracranial EEG in a High-Field MRI Environment: Safety Evaluation
Federico P, Goodyear B, Boucousis S
University of Calgary
Safety testing of intracranial electrodes has not yet been performed at high field strengths. A phantom model was constructed for in vitro measurements of electrode movement, temperature, and induced voltage in the static MR environment and during MR imaging protocols. The electrodes showed no measurable movement/torque in the MR environment. Temperature change along the electrodes and surrounding tissue was <1C over a one-hour scanning period. Induced voltage levels ranged from 100 mV to 3500 mV at a frequency of 127 MHz. These preliminary results indicate that intracranial EEG should be safe in a 3 Tesla environment.