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Semiquantitative grading of severity of Power Doppler signal in rheumatoid arthritis.
| PDUS grading [11] | |
|---|---|
| Grade 0: being with no signal visualized | |
| Grade 1: having one single or several vessels visualized | |
| Grade 2: less than 50% of the region of interest having signal | |
| Grade 3: being more than 50% of the region of interest having signal |
