Subtractionless MR Angiography of the Neck Using Dixon-based MRI
Ivan E Dimitrov1,2, Qing Yuan3, Sepand Salehian3, Gaurav Khatri3, Marco Pinho3, and Ivan Pedrosa2,3
1Philips Medical Systems, Cleveland, OH, United States, 2Advanced Imaging Research Center, UT Southwestern Medical Center, Dallas, TX, United States, 3Radiology, UT Southwestern Medical Center, Dallas, TX, United States
We investigated the
ability of dynamic contrast-enhanced (DCE) dual-echo multi-peak Dixon-based
imaging to generate MR angiography of the neck, without the need of subtraction
thus eliminating the possibility of errors due to motion. In six patients with
multiple sclerosis, DCE MRA based on subtraction of pre-contrast from
post-contrast images was compared with MRA generated solely from the
post-contrast data where fat suppression was achieved using Dixon-based water
imaging. While high levels of vessel-to-background contrast was observed in
both methods, the subtractionless DIXON-MRA resulted in higher overall contrast
for the aortic arch, the brachiocephalic arteries, and the carotid bifurcation.
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