Abstract #0414

Implant-Friendly Excitation Strategies for Imaging DBS Electrodes at 7T

Alireza Sadeghi-Tarakameh¹, Lance DelaBarre¹, Nur Izzati Huda Zulkarnain¹, Noam Harel¹, and Yigitcan Eryaman¹

¹Center for Magnetic Resonance Research (CMRR), University of Minnesota, Minneapolis, MN, United States

We mitigated the radiofrequency heating at the contacts of a DBS electrode by utilizing an implant-friendly (IF) excitation scenario at 7T. IF modes of a 16-channel transmit/receive coil are calculated by minimizing electrode-shaft current close to the contacts. An IF excitation is calculated by shimming the B₁⁺ field in an ROI using individual IF modes of the array. The proposed approach is able to mitigate the shaft current and RF heating at the contacts.

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