5.0T MRA techniques for evaluating Moyamoya disease: 4D-ASL-MRA vs. 3D-TOF-MRA.

Purpose: Three-dimensional time-of-flight MR-angiography (3D-TOF-MRA) at 5.0T showed comparable capacity to 7.0T for visualizing small vessels, but has not yet been compared with arterial spin labeling (ASL)-based four-dimensional MR-angiography (4D-ASL-MRA) at 5.