Table 2.

Visual scoring system used to evaluate image quality and vessel wall delineation.

Score	Image quality and artifacts	Vessel delineation of outer contour and branching arteries
3	Excellent image quality without artifacts	Vessel is delineated with excellent signal and sharp contrast to the lumen and CSF
2	Good image quality with slight artifact	Vessel is delineated with adequate signal and contrast to lumen and CSF
1	Moderate image quality with moderate artifact	More than 50% of vessel is visible
0	Poor image quality with large artifact	Less than 50% of vessel is visible