Question

what degree of tube angulation is required for a posteroanterior (pa) chest radiograph?
0 degrees (perpendicular)
15 degrees cephalad
30 degrees caudad
40 degrees cephalad

Explanation:

In a posteroanterior (PA) chest radiograph, the tube is positioned perpendicular to the patient's chest, which means 0 - degree angulation. Other angulation values are used for different imaging needs.

Answer:

0 degrees (perpendicular)