Table 1: Criteria for diagnosis and grading of stenosis in B-mode and color Doppler ultrasound.
|
|
< 75% Stenosis |
≥ 75% Stenosis |
Occlusion |
|
B-mode US |
No plaque or thrombus Plaque or thrombus < 50% of luminal diameter |
Plaque or thrombus ≥ 50% of luminal diameter |
Plaque or thrombus with no visible lumen |
|
Color Doppler US |
Color filled > 50% of luminal diameter |
Color filled < 50% of luminal diameter and color aliasing |
No color filled |