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Abstract #3923

Gold-Aluminum Composite Electrodes for Brain Stimulation and LFP Recording with Reduced Image Artifacts at 16.4 Tesla

Corey Cruttenden1, Mahdi Ahmadi1, Yi Zhang2, Wei Zhu2, Rajesh Rajamani1, Xiao-Hong Zhu2, and Wei Chen2
1Mechanical Engineering, University of Minnesota, Minneapolis, MN, United States, 2Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

Understanding the mechanisms of deep brain stimulation (DBS) would benefit from the ability to perform DBS simultaneously with functional magnetic resonance imaging (fMRI), but DBS electrodes introduce severe artifacts in fMRI. We constructed a novel gold-aluminum composite wire bundle and tested it for reducing B0 field distortion and image artifacts in phantom and in vivo at ultrahigh field (UHF) of 16.4T. The composite wire bundle exhibited superior performance compared to controls made of only gold or only aluminum. The new composite material structure can be applied to make multi-channel DBS electrodes with significantly reduced image artifacts even in UHF fMRI.

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