Question

how should patients be positioned to ensure that the scapulae do not superimpose on the lung fields when performing a posteroanterior (pa) chest radiograph?
arms above the head
hands on the hips with the shoulders rolled backward
arms in the anatomic position
hands on the hips with shoulders rolled forward

Explanation:

To prevent scapulae from superimposing on lung fields in a PA chest radiograph, rolling shoulders backward (with hands on hips) pulls scapulae laterally and away from lung fields. Other options don't achieve this: arms above head may not move scapulae enough, anatomic position keeps scapulae over lungs, and forward - rolled shoulders bring scapulae toward lungs.

Answer:

B. hands on the hips with the shoulders rolled backward