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Fig. 1. —23-year-old man with knee pain. Typical appearance of articular cartilage on routine clinical imaging is shown on this coronal intermediate-weighted fast spin-echo 1.5-T image (TR/TE_eff, 2,000/19). Thin low-signal-intensity surface layer (s), higher-signal-intensity transitional layer (t), and low-signal-intensity deep layer (d) with vertical striations are present. Relative thickness of these three layers is significantly different in central region of lateral plateau (cent) compared with submeniscal region (sm), in which transitional and surface layers are much thicker. Image plane includes posterior portion of medial plateau with larger submeniscal region (arrowheads).