Free-breathing Motion Corrected Phase Contrast Flow Quantification
Hui Xue 1 , Peter Kellman 2 , Kendall O'Brien 3 , and Michael Schacht Hansen 1
Magnetic Resonance Technology Program,
National Heart, Lung, and Blood Institute, National
Institutes of Health, Bethesda, MARYLAND, United States,
Image and Signal Processing Program, National Heart,
Lung, and Blood Institute, National Institutes of
Health, Bethesda, MARYLAND, United States,
National Medical Center, Washington, DC, United States
Phase contrast measurements can either be acquired with
a breath-held segmented acquisition or a free-breathing
acquisition with multiple averages to mitigate
respiratory motion artifacts. The breath-held techniques
require long breath-holds that are poorly tolerated by
patients and the multiple average acquisitions are time
consuming and suffer from reduced vessel edge sharpness.
This work proposes a new approach for free breathing
phase contrast velocity measurements where motion
correction is explicitly integrated into the
reconstruction along with non-linear parallel imaging.
The technique provides faster high-resolution free
breathing flow quantification.
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