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Table 1: Image quality
Grade Characteristics
4 Excellent (high contrast, no artifacts)
3 Good (high contrast; minimal artifacts, eg, due to movement or implants)
2 Compromised (eg, noticeable movement artifacts and/or reduced homogeneity of the vessel contrast)
1 Heavily compromised (low contrast and/or strong movement artifacts)
0 Not diagnostic (vasculature is not differentiable due to heavy artifacts and/or missing contrast)

Grade	Characteristics
4	Excellent (high contrast, no artifacts)
3	Good (high contrast; minimal artifacts, eg, due to movement or implants)
2	Compromised (eg, noticeable movement artifacts and/or reduced homogeneity of the vessel contrast)
1	Heavily compromised (low contrast and/or strong movement artifacts)
0	Not diagnostic (vasculature is not differentiable due to heavy artifacts and/or missing contrast)