Figure 6From: Quantitative ultrasonic assessment for detecting microscopic cartilage damage in osteoarthritisMacroscopic findings of rabbit articular cartilage at 1 week (a), 4 weeks (b) and 8 weeks (c) after collagenase injection. Photomicrographs of rabbit articular cartilage at 1 week (d), 4 weeks (e) and 8 weeks (f) after collagenase injection are also shown (Safranin-O staining; magnification × 4).Back to article page