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Is the needle tip in an intra-articular position?
No. Iodinated contrast extends into and along the infraspinatus muscle.
What is the target area for a posterior shoulder arthrogram injection?
The inferomedial aspect of the humeral head.
Posterior approach: Injection of contrast
Images from a shoulder/ glenohumeral arthrogram injection.
A 22G quincke is inserted targeting the inferomedial aspect of the humeral head. The run of images shows iodinated contrast extending along the infraspinatus muscle and not extending into the joint.