Abstract #1182

Subtractionless MR Angiography of the Neck Using Dixon-based MRI

Ivan E Dimitrov^1,2, Qing Yuan³, Sepand Salehian³, Gaurav Khatri³, Marco Pinho³, and Ivan Pedrosa^2,3

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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