What should the collimation for the AP elbow include?

The collimation for the anteroposterior (AP) elbow should include the distal humerus and proximal radius and ulna, along with any surrounding soft tissue. This comprehensive collimation ensures that the entire area of interest is included in the radiographic field, which is essential for accurate imaging and diagnosis.

Including the distal humerus is crucial as it allows the radiologist to assess any potential fractures or abnormalities in the elbow joint. Similarly, including the proximal radius and ulna ensures that any relevant pathology in these areas is visible. The addition of soft tissue in the collimation margin is important because it provides context for any findings in the bony structures and can aid in the assessment of swelling or other soft tissue injuries that may accompany elbow conditions.

This approach maximizes image quality while minimizing radiation exposure to surrounding tissues since proper collimation limits the area being exposed. A well-collimated radiograph enhances diagnostic accuracy and is a key part of effective radiographic technique.