Computed tomography, also known as CT scans or CAT scans, are diagnostic imaging procedures that use a combination of X-rays and computer technology to produce detailed images of the inside of the body. CT scans can show detailed images of any part of the body, including bones, muscles, fat, organs, and blood vessels.

CT scans are often used to diagnose cancer because they can show the size, shape, and location of a tumor. They can also be used to find out whether a tumor is benign (non-cancerous) or malignant (cancerous). CT scans can also be used to guide biopsies (removal of tissue samples for laboratory testing).

In general, CT scans are quick, painless, and easy to tolerate. The entire procedure usually takes 30 minutes or less. The images produced by CT scans are very detailed and can often provide more information than other imaging tests, such as X-rays or MRIs.

CT scans are not without risks, however. Because CT scans use ionizing radiation, there is a small risk of developing cancer from a CT scan. The risk is highest for children and young adults and is generally considered to be low for most adults. CT scans also carry a small risk of causing an allergic reaction in some people.