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Abstract #1952

Current density imaging using novel carbon electrodes proposed for Deep Brain Stimulation (DBS)

Munish Chauhan1, Neeta Ashok Kumar1, Fanrui Fu1, and Rosalind J Sadleir1

1School of Biological and Health Systems Engineering, Arizona State University, TEMPE, AZ, United States

Deep Brain Stimulation (DBS) is popular in the treatment of movement disorders. Conventional metal DBS electrodes present MR safety and susceptibility problems. We implemented novel carbon fiber electrodes that produced low susceptibility artifacts for imaging DBS current densities at 7 T. We used Magnetic Resonance Electrical Impedance Tomography (MREIT) to measure the z-component of the magnetic flux density (Bz) resulting from DBS-like pulses and reconstructed projected current density maps (JP) in two objects (agarose-gelatin phantom and ex-vivo piglet brain). We did not observe susceptibility artifact, and reconstructed projected current density maps agreed with simulation in the electrode neighborhood.

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