A radiograph of a posteroanterior (PA) axial projection (Caldwell method) of the cranium reveals that the petrous ridges are located at the level of the lower one-third of the orbits.The technologist performed this projection with the CR angled 15° caudad to the orbitomeatal line (OML).How must positioning be altered if a repeat exposure is performed?

Question

Quizplus · Accepted Answer

The positioning was correct as the petrous ridges should be in the lower third of the orbits for a PA axial (Caldwell method) projection with a 15° caudad angle.

A Radiograph of a Posteroanterior (PA) Axial Projection (Caldwell Method)