They show internal injuries and bleeding, such as those caused by a car accident.If you have a condition like cancer, heart disease, emphysema, or liver masses, CT scans can spot it or help doctors see any changes.CT scans can detect bone and joint problems, like complex bone fractures and tumors.What Is It Used For?ĭoctors order CT scans for a long list of reasons: In most cases, you’ll go home the same day. It can take anywhere from a few minutes to a half-hour. How long the scan takes will depend on what parts of your body are being scanned. You may need to hold your breath at times. Movement can blur the image, so you’ll be asked to stay very still. It’s normal to hear a whirring or buzzing noise. As the table slowly moves through the scanner, the X-rays rotate around your body. During the test, you’ll lie on a table inside a large, doughnut-shaped CT machine. You may also need to wear a hospital gown and remove any metal objects, such as jewelry.Ī radiology technologist will perform the CT scan. Your doctor might tell you not to eat or drink for a few hours before the procedure. You'd probably get a scan at a hospital or radiology clinic. For example, a surgeon may use this type of scan to look at all sides of a tumor to prepare for an operation. The computer stacks these scans one on top of the other to create a detailed image of your organs, bones, or blood vessels. This process is repeated to produce a number of slices. Like one piece in a loaf of bread, this two-dimensional (2D) scan shows a “slice” of the inside of your body. A computer uses this information to create a cross-sectional picture.
Web slices computer definition series#
This provides a series of images from many different angles. They use a narrow X-ray beam that circles around one part of your body. The procedure doesn't take very long, and it's painless.
You can get a CT scan on any part of your body. It shows more detail than a regular X-ray. It uses a combination of X-rays and a computer to create pictures of your organs, bones, and other tissues. A computed tomography (CT or CAT) scan allows doctors to see inside your body.
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