Abstract #0548

Ultra-high field imaging of deep brain stimulation at 7T: The first study of RF safety, displacement force and image artifact

Bhumi Bhusal¹, Jason Stockmann², Azma Mareyam², John Kirsch², Lawrence L Wald², Mark J Nolt¹, Joshua Rosenow¹, Roberto Lopez-Rosado¹, Behzad Elahi¹, and Laleh Golestanirad¹

¹Northwestern University, Chicago, IL, United States, ²Massachusetts General Hospital, Charlestown, MA, United States

We report the results of MRI safety and image artifact assessment of a commercial deep brain stimulation (DBS) system implanted in an anthropomorphic phantom, undergoing MRI at 7T. RF heating was observed to be less than 2°C for all clinically relevant as well as worst-case configurations evaluated in the study. The magnetic force on the pulse generator was found to be within the safe limit. Metal-induced image artifact was comparable to what is observed at lower fields. Our results indicate that 7T MRI could be performed safely in patients with DBS implants under carefully evaluated device model and MRI hardware.

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