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Modified-Clinical Grading System for Scoring Cartilage Integrity Using CT Images
| Grade 0 | Normal cartilage thickness and appearance |
| Grade 1 | Minor superficial indentation and cartilage heterogeneity |
| Grade 2 | Cartilage thinning up to 50% |
| Grade 3 | Cartilage thinning from 50% to 100%, no subchondral bone involvement |
| Grade 4 | Complete cartilage loss and erosion of underlying subchondral bone |
CT indicates computed tomography
