Abstract #0544

Gradient response harvesting for continuous system characterization during MR sequences

Bertram J. Wilm¹, Benjamin E. Dietrich¹, Jonas Reber¹, S. Johanna Vannesjo¹, and Klaas P. Pruessmann¹

¹Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich, Switzerland

Gradient impulse response functions were recently proposed to characterize MR gradient systems with high accuracy. However, changes of the impulse response, e.g. due to thermal drifts, can limit its accuracy and hence applicability. To overcome this problem, we present a novel method where the gradient response is continuously characterized during MR sequences from repeatedly performed field probe measurements. The benefit of this method is demonstrated by obtaining the continuous gradient output of MR sequences and first imaging results are presented.

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