Abstract #4110
Respiratory motion-resolved compressed sensing reconstruction of free-breathing radial acquisition for improved dynamic liver MRI with hepatobiliary contrast agent
Hersh Chandarana 1,2 , Li Feng 1,2 , Justin Ream 1 , Annie Wang 1 , James Babb 1 , Kai Tobias Block 1,2 , Mary Bruno 1 , Daniel K Sodickson 1,2 , and Ricardo Otazo 1,2
1
Radiology, Center for Biomedical Imaging,
NYU School of Medicine, New York, NY, United States,
2
Radiology,
Center for Advanced Imaging Innovation and Research
(CAI2R), NYU School of Medicine, New York, NY, United
States
This work applies the novel XD-GRASP technique for
continuous free-breathing motion-sorted golden-angle
radial MRI to the examination of patients undergoing
liver MRI using the hepatobiliary contrast agent
Gd-EOB-DTPA, which is known to result in suboptimal
quality of the arterial phase. Continuously acquired
k-space data were sorted into contrast-enhancement and
respiratory phases, and reconstructed using a compressed
sensing approach that exploits sparsity along the
dynamic dimensions. Our results demonstrate that
arterial-phase XD-GRASP reconstructions had superior
image quality compared to conventional GRASP, as well as
to standard breath-hold examinations. XD-GRASP has the
potential to improve imaging in patients undergoing
Gd-EOB-DTPA enhanced MRI.
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