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Figure 4: PS-OCT sensitivity of normal cartilage. (a)–(c) OCT image of cartilage at three different polarization states. They depict well defined bands that shift homogeneously with the change in polarization states, which is indicative of organized collagen. (e) Picrosirius red stain of the tissue that shows a homogeneously bright orange/yellow articular cartilage suggesting strongly organized collagen. Image courtesy of Drexler et al. [7].