Correction of background phase offsets in phase-contrast MRI using concurrent magnetic field monitoring.
Daniel Giese 1,2 , Bertram Wilm 2,3 , Julia Busch 2 , David Maintz 1 , Christoph Barmet 2,3 , Klaas Pruessmann 2 , and Sebastian Kozerke 2
Radiology, University Hospital Cologne,
for Biomedical Engineering, University and ETH Zurich,
Magnetic Resonance Technologies, Zurich, Switzerland
Concurrent magnetic field monitoring is used to analyze
and correct for eddy-current related background phase
offsets in phase-contrast MRI. It is demonstrated that
3rd order correction results in residual background
offsets of less than 0.6 cm/s. Using simultaneous
acquisition of field monitoring and imaging data,
temperature dependent changes in background phase
offsets are inherently captured and corrected for.
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