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Abstract #1132

Feasibility of using a 3-axis multi-channel TMS coil array for B0 shimming of the brain at 3T

Jason P. Stockmann1,2, Lucia Navarro de Lara1, Larry Wald1,2, and Aapo Nummenmaa1,2
1A. A. Martinos Center, Massachusetts General Hospital, Charlestown, MA, United States, 2Harvard Medical School, Boston, MA, United States

We explore the local field control capability of a 48ch TMS coil array to perform B0 shimming in the brain. The array uses sixteen 3-axis TMS coils built using three independent orthogonal windings that provide added flexibility to orient the resultant magnetic dipole and thus facilitate tailoring the B0 shim field. We propose adapting the TMS coils to carry DC shim currents during EPI fMRI time series acquisitions to reduce artifact levels and improve the utility of TMS-fMRI for studying brain circuits.

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