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Table 1 Criteria for evaluating MMD patients after surgical revascularization

From: High-resolution compressed sensing time-of-flight MR angiography outperforms CT angiography for evaluating patients with Moyamoya disease after surgical revascularization

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