Articular cartilage Defect- MRI
The International Cartilage Repair Society has set up an arthroscopic grading system by which cartilage defects can be ranked:
- grade 0: Healthy cartilage
- grade 1: the cartilage has a soft spot
- grade 2: minor tears visible in the cartilage
- grade 3: lesions have deep crevices (more than 50% of cartilage layer)
- grade 4: the cartilage tear exposes the underlying (subchondral) bone
On MRI, FS 3D gradient-echo MRI is helpful for differentiating between grade 3 and grade 4 cartilage defects.
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