Gradient inserts allow for faster switching and higher gradient strengths than conventional whole-body gradient coils. However, the higher gradient performance is accompanied by an increase in acoustic sound pressure. We present a gradient insert that switches at 20 kHz (above human hearing perception) and therefore allows for imaging with an inaudible gradient axis. Additionally, we introduce a readout scheme for imaging at 20 kHz, and show the first imaging results on a phantom and a healthy volunteer using an inaudible gradient axis.
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