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Abstract #0216

Higher-Order Monitoring of Physiological Field Fluctuations in Brain MRI at 7T

MAGNA25Signe Johanna Vannesjo1, Christoph Barmet1, Yolanda Duerst1, Simon Gross1, David O. Brunner1, Klaas P. Pruessmann1

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

Field fluctuations caused by breathing and limb motion can have a strong degrading effect on quality of brain images at high fields. Partly, the resulting artifacts can be corrected for by proper f0-demodulation of the object signal, based on field data from navigators or concurrent field monitoring. In this work, we investigate the contribution of higher-order field components to the perturbations, and use concurrent field monitoring up to 2nd order to additionally improve image quality in high-resolution T2*-weighted GRE sequences.e 2nd-order concurrent field monitoring to correct for induced artifacts.