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Fig. 5A. Axial proton density-weighted fat-saturated MR images of
shoulder in 28-year-old woman. MR images show shoulder in neutral anatomic
position (A), Crass position (B), and modified Crass position
(C). Note supraspinatus tendon (arrow) moves from lateral
position in neutral to anterior in Crass position and anterolateral in
modified Crass position, which affords better sonographic visualization in
Crass and modified Crass positions.