Criterion and Interpretation | Score |
---|---|
Visualization of bypass | |
Poor: almost no visualization | 0 |
Moderate: blurred vessel margins with heavily attenuated signal intensity/density | 1 |
Good: blurred vessel margins with slightly attenuated signal intensity/density | 2 |
Excellent: clear vessel margins with intense signal/density | 3 |
Visualization of anastomosis patency | |
Occluded | 0 |
Patent | 1 |
Visualization of neovascularization | |
Null: almost no visualization | 0 |
Localized: covering less than 25% of the operation area | 1 |
Moderate: covering 25% to 50% of the operation area | 2 |
Abundant: covering more than 50% of the operation area | 3 |
Visualization of Moyamoya vessels | |
Not visible | 0 |
Scarcely visible (vessel segments were visualized but inadequate for diagnosis) | 1 |
Visible (vessel segments are visualized and adequate for diagnosis, but vessel-tissue contrast does not appear to be high) | 2 |
Excellent (vessel segments were clearly and continuously visualized, and vessel-tissue contrast was high) | 3 |