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 0^th and 1^st 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.