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Fig. 1A —MR images using different protocols. Images from cadaveric specimens 3 (A) and 5 (B). Presence of intraarticular fibrocartilaginous disk is confirmed by corresponding toluidine blue–stained sections. Arrows mark border between intraarticular disk and articular cartilage on acromial side. Images were acquired using dual T2- and proton density–weighted (upper left), dual T2-weighted turbo spin-echo (upper right), T2-weighted fast-field echo (lower left), and 3D water-selective (lower right) sequences. Center images show correlating histology sections.