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Comparison of synovial blood flow signal distribution before and after treatment between the two groups
| Time | Group | Level 0 | Level I | Level II | Level III |
|---|---|---|---|---|---|
| Before treatment | Control group | 18 | 29 | 12 | 0 |
| Experimental group | 21 | 26 | 12 | 0 | |
| χ2 | 0.426 | ||||
| P | 0.808 | ||||
| After treatment | Control group | 32 | 18 | 9 | 0 |
| Experimental group | 46 | 10 | 3 | 0 | |
| χ2 | 8.560 | ||||
| P | 0.014 |
