A poorly positioned inferosuperior axial shoulder projection demonstrates the inferior glenoid cavity medial to the lateral edge of the coracoid process. To obtain an optimal projection,
A) increase the central ray to lateral body surface angle.
B) decrease the central ray to lateral body surface angle.
C) decrease the degree of humeral abduction.
D) elevate the patient on a sponge or washcloth.

Question

Quizplus · Accepted Answer

Decreasing the central ray to lateral body surface angle will help move the inferior glenoid cavity lateral to the coracoid process, resulting in a better positioning for the inferosuperior axial shoulder projection. Increasing the angle would have the opposite effect and move the glenoid cavity even further medial. Decreasing the degree of humeral abduction or elevating the patient on a sponge or washcloth would not address the issue of the glenoid cavity being in the wrong position.

A Poorly Positioned Inferosuperior Axial Shoulder Projection Demonstrates the Inferior