What is the standard cassette size used for an AC joint x-ray?

For an AC joint x-ray, the standard cassette size is 8" x 10". This size is typically sufficient to capture the necessary anatomy of the acromioclavicular joint, providing an adequate field of view to visualize the joint space, surrounding structures, and any potential pathologies.

Using the 8" x 10" cassette allows for a focused image that minimizes unnecessary radiation exposure while still ensuring that key anatomical relationships are visible. In practice, this specific size strikes a balance between adequate resolution and patient safety, which are critical considerations in radiographic imaging.

Other sizes listed are either larger than necessary or are used for different views or studies. Larger cassettes might include more surrounding anatomy, but they are not needed specifically for the AC joint, where specificity is key.