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Spatially matched 3D dual-echo steady-state (DESS) images of a 66-year-old man. 7 T MRI (A–C) and 3 T MRI (D–F) of the left knee. At 7 T, the hypointense calcium crystal deposits in the femorotibial and patellar cartilage are clearly and sharply visible (arrows), whereas at 3 T MRI, these are much less visible, even without equivalent signal change (arrowheads).
