Computed tomography scan (CT or CAT scan) is a non-invasive diagnostic imaging procedure that uses a combination of special X-ray equipment and sophisticated computer technology to produce cross-sectional images (often called slices), both horizontally and vertically, of the body. These cross-sectional images of the area being studied can then be examined on a computer monitor or printed. 

CT scans are more detailed than general X-rays, showing detailed images of any part of the body, including the bones, muscles, fat, and organs. CT scans of internal organs, bone, soft tissue and blood vessels provide greater clarity and reveal more details than regular X-ray exams. CT scans also minimize exposure to radiation. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly