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Abstract #0045

Real-Time Field Control Using Full 3rd-Order Matrix Pre-Emphasis

Yolanda Duerst1, Bertram J. Wilm1, Benjamin E. Dietrich1, Simon Gross1, Thomas Schmid1, David O. Brunner1, and Klaas P. Pruessmann1

1ETH Zurich, Zurich, Switzerland

Update steps of real-time field control suffer from imperfect shim responses which degrade control quality. By including full 3rd-order matrix pre-emphasis as an additional filter in the control loop, all self-term responses are shaped to be equal and all cross-term responses are directly suppressed. This leads to disturbances being rejected faster and less noise amplification. Thus enables better field control in demanding situations such as caused by disturbance of high spatial and temporal variability.

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