Question

what is the recommended source - to - image distance (sid) for an anteroposterior (ap) chest radiograph?
30 inches (76 cm)
40 inches (102 cm)
60 inches (152 cm)
72 inches (183 cm)

Explanation:

In radiography, for an anteroposterior (AP) chest radiograph, the standard - recommended source - to - image distance (SID) is 72 inches (183 cm) to reduce magnification and distortion and provide a clear image of the chest structures.

Answer:

D. 72 inches (183 cm)