Answer:
To demonstrate the mandibular body in the posteroanterior (PA) position, the central ray (CR) is directed perpendicular to the image receptor (IR).
Explanation:
Different evaluations for the mandibula shape follow a set of series which involve three views: posteroanterior view, oblique and lateral view.
In a posteroanterior (PA) mandibular radiography, is a technique by which the whole mandibular body is covered, showing fractures, dislocations, neoplasms, and inflammations. In this practice, the central ray (CR) must be perpendicular to the image receptor (IR).
