Question

To demonstrate the mandibular body in the PA position, theA CR is directed perpendicular to the IR.B CR is directed cephalad to the IR.C skull is obliqued away from the affected side.D skull is obliqued toward the affected side.

Answer 1

To demonstrate the mandibular body in the posteroanterior (PA) position, the central ray (CR) is directed perpendicular to the image receptor (IR).

Step-by-step 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).