How do you decide between PA vs AP projection for chest radiographs in adults?

How do you decide between PA vs AP projection for chest radiographs in adults?

• A. PA is preferred to reduce magnification and better inspiratory effort; AP used when patient cannot stand or for portable exams; consider body habitus and clinical indication.
• B. AP is always preferred over PA.
• C. The projection does not affect image quality.
• D. Chest radiographs are always PA.

Answer: (A)