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Fig. 6 —15-year-old girl with knee pain and swelling. Sagittal contrast-enhanced 3D iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) spoiled gradient-recalled echo image (3 T, TR/TE = 10.9/4.6, field of view = 16 cm, slice = 1.2 mm, 512 x 224, flip angle = 14°, acquisition time = 4 minutes 45 seconds) of knee shows thickened and nodular enhancing synovium (arrows), which is consistent with synovitis.