The central ray for a scapula Y view should be set to enter or exit:
the surgical neck
the mid shaft
the mid scapular borders
the glenohumeral joint
the glenohumeral joint
Rationale: The scapular Y view is acquired as part of a trauma shoulder routine. The humerus is obliqued along with the body until the scapular borders superimpose. The central ray should be set to enter or exit the glenohumeral joint. The scapular Y view will show anterior to posterior displacement of the humeral head and/or shaft.
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