Abstract #1095

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

Synopsis

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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