Free Breathing Dynamic Contrast Enhanced 3D MRI with Resolved Respiratory Motion
Joseph Y. Cheng 1,2 , Tao Zhang 1 , John M. Pauly 1 , Shreyas S. Vasanawala 2 , and Michael Lustig 3
Electrical Engineering, Stanford University,
Stanford, California, United States,
Stanford University, Stanford, California, United
Electrical Engineering & Computer
Sciences, University of California, Berkeley,
California, United States
Respiratory motion is a major hindrance in abdominal
MRI. Previous work has been focused on reducing
respiratory motion artifacts through correction schemes
in the image reconstruction. An alternative approach is
resolving the respiratory motion. We propose to correct
for respiratory motion in free breathing DCE-MRI by
extending the data-acquisition space to an additional
respiratory dimension. The highly undersampled
5D-dataset is reconstructed by promoting the locally
low-rank property in the DCE dimension and the total
variation penalty in the respiratory motion dimension.
The proposed technique achieves similar image quality to
a DCE-only reconstruction and a lightly undersampled
respiratory motion resolved reconstruction.
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