Which of the following is NOT an evaluation criterion for the posteroanterior (PA) axial projection (Caldwell method)?

In the context of the posteroanterior (PA) axial projection using the Caldwell method, the evaluation criteria are designed to assess the quality of the radiographic image and its anatomical accuracy. The criterion that mentions "visible cranial sutures" does not specifically apply to this projection.

The main focus of the Caldwell method is to provide a view where the petrous ridges of the temporal bones are projected into the lower third of the orbits, and the image should also demonstrate clear delineation of the cranial anatomy, including the three tables of squamous bone, which is important for identifying any pathological changes or fractures. Proper collimation is essential for reducing patient exposure to radiation and improving image quality, ensuring that only the relevant anatomy is captured.

While cranial sutures may be visible in some cases, they are not a primary evaluation criterion for the Caldwell projection specifically. The emphasis is more on the positioning of the petrous ridges and the overall depiction of the cranial silhouette rather than the clarity of sutures. This distinction highlights the specific anatomical details that are most critical in assessing the quality of the Caldwell projection.