What is the cassette size used for AP or PA clavicle imaging?

The correct choice for the cassette size used in AP or PA clavicle imaging is indeed 10" x 12" horizontal orientation. This size is appropriate for frontal views of the clavicle because it allows for sufficient coverage of the area while minimizing OID (Object to Image Distance), thereby improving image quality.

Using a horizontal orientation helps to align the clavicle properly within the image field, accommodating its anatomical structure effectively. The horizontal layout is frequently adopted to best capture the length of the clavicle, enabling optimal visualization for diagnostic purposes.

Cassette sizes and orientations are critical in radiographic procedures. A smaller cassette, such as 10" x 12", helps in focusing on the region of interest without including excess anatomy, thus enhancing the quality of the radiographs while reducing unnecessary radiation exposure to surrounding tissues.