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Abstract #3090

PSF-based reconstruction for removal of artifacts caused by misalignment between a silent gradient insert and the body gradients

Edwin Versteeg1, Dennis W.J. Klomp1, and Jeroen C.W. Siero1,2
1Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Spinoza centre for neuroimaging Amsterdam, Amsterdam, Netherlands

A silent gradient axis driven at 20 kHz can reduce sound in MR-sequences. This silent gradient axis consists of a separate coil that is positioned on the patient table and operated in synergy with the whole-body gradients. The positioning of this coil with respect to the whole-body gradients is prone to operator errors which leads to image artifacts. In this work, we show that this misalignment can be characterized and corrected by measuring the point spread function (PSF) of the silent gradient axis. Using this method, a significant reduction in ghosting artifacts was observed in phantom experiments.

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