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Abstract #5082

Development of Carbon Electrodes for Current Density Mapping during DBS

Neeta Ashok Kumar1, Munish Chauhan1, and Rosalind Sadleir1

1SBHSE, Arizona State University, Tempe, AZ, United States

We used MR phase mapping techniques in a preclinical DBS model to image current distributions nearby deep brain stimulation electrodes. To avoid safety issues and artifacts associated with imaging typical platinum-iridium (Pt-Ir) DBS leads, we developed custom carbon electrodes. We compared carbon electrode performance to size-matched Pt-Ir and clinical DBS electrodes at 7 T, using uniform phantoms and fixed brain tissue. Artifacts surrounding carbon electrodes were smaller than for Pt-Ir electrodes. Current density distributions derived from phase images were similar for both electrode types in uniform phantoms and fixed tissue.

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