Computerized tomographic (CT) scans use a specialized form of x-ray equipment that rotates around the body and sends the information to a computer.
The resulting 'slice' through the body allows the computer and operator to analyze different types of body tissue and organs as well as the skeletal structure.
Metal will affect the image and doctors will ask patients to wear comfortable clothes that do not have zippers or snaps. Jewelry, watches and hearing aids will need to be removed. The best results are obtained on an empty stomach and you will be asked not to eat or drink for a few hours before the scan.
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The scanner is a large machine and you will be placed on a sliding table. Small amounts of x-ray radiation are passed through the body and picked up by a detector as the machine rotates around the body. The final image is processed by computer and creates an onscreen picture in the form of a slice through the body.
The highly detailed cross-sections of the body are particularly useful when studying the chest and abdomen. It has found favor in the diagnosis of many different cancers including lung, liver and pancreatic cancer. Since it has the ability to detect very small bones it can prove important in diagnosing and planning spinal surgery and other injuries.
Although CT scanning is considered safer than an x-ray, it is probably wise to avoid the procedure during pregnancy.
CT scans should be avoided during pregnancy unless they are necessary for diagnosis. You should consult your doctor for advice before having a CT scan during your pregnancy.
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