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Abstract #0763

Assessment of MR compatibility for multichannel stimulation using three-axis TMS coil elements

Lucia Navarro de Lara1,2, Mohammad Daneshzand1,2, Anthony Mascarenas3, Douglas Paulson3, Sergey Makarov1,4, Jason Stockmann1,2, Larry Wald1,2,5, and Aapo Nummenmaa1,2
1Radiology, A.A Martinos Center for Biomedical Imaging/MGH, Charlestown, MA, United States, 2Harvard Medical School, Boston, MA, United States, 3Tristan Technologies, San Diego, CA, United States, 4Department of Electrical and Computer Engineering, A.A Martinos Center for Biomedical Imaging/MGH, Worcester, MA, United States, 5HST/MIT, Cambridge, MA, United States

We investigate the feasibility of using small-diameter three-axis TMS coil as a basis for constructing a simultaneous stimulation and imaging array. We present an MR-compatible 3-axis TMS coil prototype comprising of three orthogonal coil X/Y/Z units. We assess the influence of the TMS coil element on the MRI images and measure the sound pressure levels with systematically varying the current amplitudes and coil orientation with respect to the magnetic field. Supported by simulations, we conclude that construction of a large-scale multichannel; system using such a 3-axis TMS elements as a basis appears feasible but the acoustic properties should be improved

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