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.