Acoustically-transparent passive RF field repeater elements for the mitigation of the low-signal artifact and improved sensitivity in MRgFUS
Isabellle Saniour1, Victor Taracila2, Fraser J.L. Robb2, Rena Fukuda1, Jana Vincent2, Henning U. Voss1, Michael G. Kaplitt3, J. Levi Chazen1, and Simone Angela Winkler 1
1Department of Radiology, Weill Cornell Medicine, New York, NY, United States, 2GE Healthcare, Aurora, OH, United States, 3Department of Neurological Surgery, Weill Cornell Medicine, New York, NY, United States
MRgFUS image quality remains poor and suffers from a low-signal band artifact, preventing efficient image acquisition. We propose to place overlapped acoustically transparent loop elements in “passive mode” between the transducer and the head that act as a transmit field repeater/concentrator. Simulation results not only show mitigation of the low-signal band artifact in the thalamus region, but also demonstrate improvement of the RF transmit signal by a factor of 5 and 2 in the upper brain and the thalamus region, respectively.
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