What is the standard cassette size used for the AP/PA sacrum projection?

The standard cassette size used for the anteroposterior (AP) or posteroanterior (PA) sacrum projection is 10" x 12". This size is appropriate for capturing the anatomy of the sacrum effectively, providing a good balance between image quality and exposure area. The dimensions fit well with the anatomical region being imaged, ensuring that all necessary structures are visible while minimizing unnecessary exposure. Proper cassette size is crucial in radiography as it can impact the quality of the image, as well as the radiation dose to the patient. In this case, the 10" x 12" size is widely accepted and commonly used in clinical practice for sacral imaging.