CT scan

A computerized tomography scan, also called a CT scan, is a type of imaging that uses X-ray techniques to create detailed images of the body. It then uses a computer to create cross-sectional images, also called slices, of the bones, blood vessels and soft tissues inside the body. CT scan images show more detail than plain X-rays do.

Your healthcare professional may suggest a CT scan for many reasons. For instance, a CT scan can help: Diagnose muscle and bone conditions, such as bone tumors and breaks, also called fractures. Show where a tumor, infection or blood clot is. Guide procedures such as surgery, biopsy and radiation therapy. Find and watch the progress of diseases and conditions such as cancer, heart disease, lung nodules and liver masses. Watch how well certain treatments, such as cancer treatment, work. Find injuries and bleeding inside the body that can happen after trauma.

Depending on which part of your body is being scanned, you may be asked to: Take off some or all your clothing and wear a hospital gown. Remove metal objects, such as belts, jewelry, dentures and eyeglasses, that might affect image results. Not eat or drink for a few hours before your scan.

You can have a CT scan in a hospital or an outpatient facility. CT scans are painless. With newer machines, scans take only a few minutes. The whole process most often takes about 30 minutes.