For evaluation of arteriovenous malformations, contrast-enhanced 4D-MRA is useful to detect feeding arteries and draining veins. However, with the Keyhole technique, contamination of different phases is a major problem. We solved this problem by applying parallel imaging with compressed sensing to contrast-enhanced 4D-MRA(CS-4D-MRA). CS-4D-MRA was able to acquire images without contamination of the arterial phase with echo signals from the venous phase. It also had high temporal and spatial resolution, and was able to clearly visualize the feeder and the drainer.
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