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Abstract #2274

Combining variational methods and particle tracking in 4D Flow MRI for displacement artifact compensation

Stefano Buoso1, Hannes Dillinger1, and Sebastian Kozerke1
1Institute for Biomedical Engineering, ETH Zurich, Zurich, Switzerland

We propose a variational method for reconstructing divergence-free velocity fields from 4D Flow MRI data with compensation of spatial displacement artifacts. A standard 4D Flow MRI sequence to measure flow velocities in an expanding flow phantom with Reynolds number of 4000 was used. A variational formulation allows to reconstruct a divergence-free velocity field used to estimate the displacement artefact associated with spin motion between the time point of motion encoding and echo time. The field was used to apply a spatial shift of the original MRI data and compute new divergence-free flow velocities corrected for spatial motion artifacts.

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