Vascularity Grade | Huang et al. [26] | Srivastava & Aggarwal [27] |
---|---|---|
0 | N/A | No Power Doppler signals |
1 | No flow signal | ≤3 Power Doppler signals |
2 | Presence of separate dot signals or short linear signals | > 3 Power Doppler signals occupying < 50% of the lesion |
3 | Presence of clearly discernible vascularity with either many small vessels or several long vessels with or without visible branching though involving less than half of the entheses | Power Doppler signals occupying > 50% of the lesional area |
4 | Severe flow signal refers to the presence of vessels involving more than half of the entheses | N/A |