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Abstract #4586

Supersonic imaging with a silent gradient axis driven at 20 kHz

Edwin Versteeg1, Dennis Klomp1, Jeroen Hendrikse1, and Jeroen Siero1,2

1University Medical Centre Utrecht, Utrecht, Netherlands, 2Spinoza Center for Neuroimaging, Amsterdam, Netherlands

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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