Keywords: Stroke, High-Field MRI, Suzuki staging systemMoyamoya disease (MMD) is an uncommon chronic cerebrovascular disease and a leading cause of stroke in pediatric and young patients. Suzuki staging system based on conventional digital subtraction angiography (DSA) is a useful and important index in clinical. However, DSA is invasive and unnecessary in some situations. 7T TOF-MRA enables the visualization of the "puff of smoke" collateral network in MMD compared to 1.5T and 3T. We tried to grade the Suzuki staging system by using 7T TOF-MRA in MMD patients. Our results indicated that 7T TOF-MRA showed excellent performance as DSA on grading the Suzuki staging system in MMD.
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