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Fig. 3C. —78-year-old man with lateral tibial plateau removed at arthroplasty. B₀ = main magnetic field. Spin-echo MRI shows sample oriented at 55° to B₀ with slice location and imaging parameters identical to those in A. Deep layer (white arrow) signal intensity is increased, and orientation effect is also present in transitional layer (black arrow), in which striations of lower signal intensity are present on sample scanned at 55°.