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Abstract #0529

Higher-Order Feedback Field Control Improves Linewidths in MR Spectroscopy at 7T

Bertram J. Wilm1, Yolanda Duerst1, Benjamin E. Dietrich2, Michael Wyss1, David Otto Brunner2, Christoph Barmet2, 3, Thomas Schmid1, Signe Johanna Vannesjo1, Klaas P. Pruessmann1

1Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, ZH, Switzerland; 2Institute for Biomedical Engineering, University and ETH Zurich, Zurich, ZH, Switzerland; 3Skope Magnetic Resonance Technologies, 8004, ZH, Switzerland

Dynamic field changes caused by hardware imperfections or physiological induced field perturbations can cause signal loss due to increased T2* decay, inaccurate data averaging and off-resonant application of RF pulses. To prevent artifacts in MR spectroscopy, we present a higher-order real-time feedback field control system based on NMR probes which is tested for field stabilization in single-voxel brain MRS at 7T.