Computerized Tomography (CT) Scan

A computerized tomography (CT or CAT) scan provides your doctor with multidimensional images of your internal organs using a machine that is shaped like a large doughnut. The CT scanner provides images of cross-sections of the body, including organs not seen by a standard chest x-ray. Usually a CT scan provides more detailed information on soft tissue, muscles, fat and bones, so in some cases it may be better at detecting an abnormality than other tests. Depending upon your history and symptoms, your doctor may choose to have a dye-like substance, called contrast media, injected (through an IV) into your blood stream. (For other organ tests, you may be asked to drink the contrast media.) This helps to show how blood is moving through the heart. CT scans are used for diagnostic purposes and are painless.