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Abstract #0304

Field Decoupling for Real-Time Prospective Motion Correction Using Gradient Tones and Concurrent Field Monitoring

Maximilian Haeberlin1, Lars Kasper1, Christoph Barmet2, David Otto Brunner1, Klaas P. Pruessmann1

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

Gradient-based 3D positioning of an NMR field probe relies on independent information on all 3 gradient axes. Position encoding using sinusoidal gradient tones in the kHz range suffers from inductive coupling among 0th and 1st order fields. Field decoupling is demonstrated, the improvement is quantified (accuracy < 100 &[micro]m ) and the method is applied to in-vivo real-time prospective motion correction in the brain.