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Abstract #2260

Limitations of Echo Planar Imaging in PC-MRI of High Flow Regimes

Hannes Dillinger1, Jonas Walheim1, Robbert J.H. van Gorkum1, and Sebastian Kozerke1
1University and ETH Zurich, Zurich, Switzerland

An evaluation of velocity field reconstructions from echo-planar trajectories in PC-MRI relative to ground truth computational fluid dynamics (CFD) data in stenotic high flow regimes is presented. The reconstructed velocity images and variations in spatial resolution resulting from modulation of the Point Spread Function (PSF) are investigated. Significant artifacts and resolution loss of up to factor 8 for EPI in high-flow regimes of 220cm/s are found. In-vitro experiments confirm that depending on the orientation of the main flow direction the reconstructed velocity images differ significantly in regions of high shear or acceleration with implications for in-vivo applications.

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