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Abstract #0374

A rotating transmit coil and 32ch receive array for high-resolution brain imaging of DBS patients

Laleh Golestnirad 1 , Boris Keil 1 , Giorgio Bonmassar 1 , Azma Mareyam 1 , and Lawrence Leory Wald 1

1 Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States

Deep brain stimulation (DBS) is a neurosurgical procedure that involves implanting electrodes in the brain to electrical pulses to deep nuclei inside the brain for treatment of a variety of disabling movement and psychiatric disorders. We built and simulated a transmit/receive head coil, composed of a linearly polarized rotating birdcage transmitter and a close-fit 32 channel receive array. We showed that this coil has slab-like E-Null region that is thick enough at 1.5 T to encompass the whole DBS implant to significantly reduce SAR. We also showed that insertion of a 32-channel close-fit receive array has a negligible effect on the transmit field distribution and does not increase the local SAR levels at the DBS lead in 1.5 T.

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