3D-Time-of-Flight MR Angiography (3D TOF-MRA) of the intracranial vessels is a first-line and noninvasive tool for the evaluation of patients with cerebrovascular disease. However, it is still challenged at 3.0-T MR imaging because peripheral segments of the main arteries can often not be sufficiently visualized. The expected remarkable increase in visualizations of intracranial arteries segments and vessel brancher provided by ultra-high field 5.0-T MRI may be valuable for addressing above issues. Our prospective analysis demonstrated that the 5.0-T TOF-MRA provides higher improvement in visualization of distal large arteries and small vessel branches than that at 3.0-T.
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