Abstract #3685
Improved motion compensated reconstruction for 3D abdominal MRI using a self-navigated non-rigid motion model
Gastao Cruz 1 , David Atkinson 2 , Tobias Schaeffter 1 , and Claudia Prieto 1
1
Division of Imaging Sciences & Biomedical
Engineering, King's College London, London, London,
United Kingdom,
2
Centre
for Medical Imaging, University College London, London,
London, United Kingdom
Respiratory motion is a major challenge in 3D abdominal
MRI, creating ghosting and blurring. Bin-to-bin motion
correction techniques have been proposed to overcome
these problems and reduce the scan time. However,
intra-bin motion is unaccounted for resulting in,
potentially significant, residual motion artifacts. Here
we propose an intra-bin motion correction approach based
on the assumption of a linear relation between the
non-rigid motion of each acquired data within the bin
and the inter-bin non-rigid motion model. The proposed
method is compared with the conventional gated
reconstruction, showing significantly improved sharpness
and image quality.
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