Abstract #3780
Distortion Correction Using Simulated Point-Spread Functions
Genevieve M LaBelle 1 and Brad P Sutton 2,3
1
Electrical and Computer Engineering,
University of Illinois at Urbana-Champaign, Urbana, IL,
United States,
2
Bioengineering,
University of Illinois at Urbana-Champaign, Urbana, IL,
United States,
3
Beckman
Institute for Advanced Science and Technology,
University of Illinois at Urbana-Champaign, Illinois,
United States
Geometric distortion is a highly prevalent issue for
Echo-Planar Imaging (EPI), due to long readout times and
field inhomogeneities. Previously, the measured point
spread function (PSF) has been shown to be effective in
correcting this distortion. In this work, we reconstruct
an image quickly and address the distortion with a point
spread function map that was generated entirely through
simulation using the trajectory and field map. The
distortion correction with this approach is shown to be
better than k-space based iterative reconstructions and
is robust to high magnetic field maps when we use an
optimal trajectory.
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