What is one of the evaluation criteria for the posteroanterior (PA) axial projection (Caldwell method)?

One of the key evaluation criteria for the posteroanterior (PA) axial projection using the Caldwell method is the visualization of the entire cranial perimeter, which should clearly show three distinct tables of squamous bone. This criterion is essential as it ensures that the image captures the relevant anatomy in its entirety, providing a comprehensive view of the skull structure. Proper positioning and technique during the radiographic procedure enable the distinct representation of these three layers, which include the outer cortex, inner cortex, and diploe of the skull, allowing for accurate diagnosis and assessment of any cranial pathologies. This assessment is vital for radiologists and medical professionals in evaluating cranial integrity and health.