Large dB/dt swings in gradient coils can induce peripheral nerve stimulation (PNS) in the human body. This limits the slew rates used in whole-body MRI reducing scan speeds and spatial resolution. Ultrasonic head gradients can enable fast and silent imaging, however extension to whole-body gradients is challenging due to the required larger dB/dt swings. In this work, we present a body gradient coil which can be used to investigate PNS induction at an ultrasonic driving frequency of 20kHz.
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McGrory et al. (2024) studied this question.
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