Chest X-ray is an extremely common procedure done to evaluate the organs located in the chest area i.e. lungs, heart, and chest wall. It also helps in diagnosing the cause of various symptoms. (for example persistent cough, shortness of breath, chest pain or injury, and fever.
Chest Xray
HIV-infected patient presenting with unexplained pulmonary or constitutional symptoms should have a chest xray.
Pneumocystis pneumonia
The disease PCP is relatively rare in people with normal immune systems, but common among people with weakened immune systems, such as premature or severely malnourished children, the elderly, and especially persons living with HIV/AIDS, in whom it is most commonly observed.[1] PCP can also develop in patients who are taking immunosuppressive medications. Chest x-ray shows widespread pulmonary infiltrates.
Reference
↑Ryan KJ; Ray CG (editors) (2004). Sherris Medical Microbiology (4th ed.). McGraw Hill. ISBN0838585299.CS1 maint: Extra text: authors list (link)