CAMRT Radiography Practice Exam

Why is an AP Axial image of the clavicle or AC joints performed?

1. To assess for fractures

2. To rule out subluxation/dislocation

3. To evaluate arthritis

4. To visualize soft tissue structures

The correct answer is: To rule out subluxation/dislocation

An AP Axial image of the clavicle or AC joints is particularly useful for ruling out subluxation or dislocation. This imaging technique involves angling the x-ray beam, which helps to better visualize the relationships between the clavicle, acromion, and the surrounding structures. By demonstrating the joint in a slightly altered perspective, it enhances the ability to detect subtle displacements or misalignments that might indicate a subluxation or dislocation. The AP Axial projection is essential because, in cases of joint abnormalities, a standard projection may not provide sufficient detail to identify these conditions effectively. This specific technique emphasizes the joint space and the anatomy of the acromioclavicular joint, thus making it an important tool for clinicians when assessing potential injuries or dislocations in these areas.