Computerized tomographic (CT) arthrography of the shoulder

The upper panel illustrates a normal double contrast CT arthrogram (air and radiopaque contrast). The anterior glenoid labrum (arrows) and the normal extent of the anterior glenohumeral joint capsule (arrowhead) are seen in this axial image. In the lower panel, a tear of the anterior glenoid labrum is seen (air and contrast abuts the bone of the glenoid); the fibrocartilaginous labrum has been avulsed.