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Figure 3: Representative images obtained during arthroscopy, optical coherence tomography (OCT), and magnetic resonance imaging (MRI) mapping relaxation times. The higher the relaxation time reflects a greater degree of hydration which may correlate with increased articular cartilage degeneration. ((a)–(c)) arthroscopically firm (a), OCT with birefringence (b), and MRI mapping (c). ((d)–(f)), arthroscopically firm (d), OCT without birefringence (e), and MRI map (f). ((g)–(i)), arthroscopic fissuring (g), OCT with surface fissuring and fibrillation (h), and MRI map (i).