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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