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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