A chest X ray is most commonly done X ray. It helps to detect abnormalities in the lungs, but can also detect abnormalities in the heart, aorta, and the bones of the chest. It can pick up pneumonia, fluid in the lungs, cysts, infections, fractures and heart enlargement commonly. Other X rays done commonly are the X ray of the spine to spinal problems, X rays of the limbs for fractures and X ray of the teeth. Any part of the body can be X rayed depending on what the doctor is suspecting.