An accurate PA oblique scapular Y shoulder projection is obtained
a. when an imaginary line connecting the coracoid process and acromion angle is aligned perpendicular to the IR.
b. when the resulting image demonstrates the superior scapular angle positioned su-perior to the clavicle.
c. when an imaginary line connecting the coracoid process and acromion angle is aligned parallel with the IR.
d. only when the glenoid cavity superimposes the humeral head.
C
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