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Abstract #2716

Analysis of Measurement Precision in Continuous Magnetic Field Monitoring

Benjamin E. Dietrich1, David Otto Brunner1, Bertram J. Wilm1, Christoph Barmet1, 2, Klaas P. Pruessmann1

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

Dynamic magnetic field monitoring with NMR probes enables the observation of the spatio-temporal magnetic field evolution during MR experiments. A recently proposed method based on time interleaved acquisition of sets of fast relaxing NMR probes allows scanner independent dynamic magnetic field monitoring even under strong gradients over arbitrary durations. Such continuous gradient field monitoring alleviates hence the limitation on resolution, acquisition duration and duty cycle of the approaches shown using a single coherence. The presented work assesses the precision of this method with regard to different field-probe-set configurations, gradient strengths, set alternation patterns, and re-excitation periods.