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Synovial fluid 3D object presented in both T1 and T2 MR images. (A) Synovial effusion segmentation (white contours) of a representative knee osteoarthritis patient MRI T2 image slice and (B) transported into the corresponding T1 image (black contours), showing that the synovial membrane (bright tissue; white arrows) is excluded from the joint effusion objects (black arrows).
