HEALTH & DISEASE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site chest X-ray How a chest X-ray is carried out Credit: National Cancer Institute Chest X-ray of normal appearance taken from the back of an adult male An X-ray of the chest, lungs, heart, large arteries, ribs, and diaphragm. The test is carried out in a hospital radiology department or in the health care provider's office by an X-ray technician. Two views are usually taken: one in which the X-rays pass through the chest from the back (posterior-anterior view), and one in which the X-rays pass through the chest from one side to the other (lateral view). You stand in front of the machine and must hold your breath when the X-ray is taken. A chest X-ray may be ordered when a person's symptoms include a persistent cough, coughing up blood, chest pain, a chest injury, or difficulty in breathing. The test is also used when tuberculosis, lung cancer, or other chest or lung disease is suspected. A serial chest X-ray (repeated or sequential) may be used to evaluate changes (for example, an increase in the size of an abnormality) found on a previous chest X-ray. Risks There is low radiation exposure. X-rays are monitored and regulated to provide the minimum amount of radiation exposure needed to produce the image. Most experts feel that the risk is very low compared with the benefits. Pregnant women and children are more sensitive to the risks of the X-ray. Chest X-rays are generally avoided during the 1st and 2nd trimesters of pregnancy (a trimester is a period of 3 months). Related entry    • chest CT scan Related category    • HEALTH AND DISEASE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP