A computerized tomography scan---known as a CT or CAT scan---is an upgraded version of an X-ray combined with computer technology. The result is a clearer, more-detailed view of the inside the body. CT scans can produce pictures of an individual's bones, organs like the kidneys and even blood vessels. Information from the National Library of Medicine explains that this type of "scan" is not invasive and takes only minutes to complete.
Diagnostics
One of the most common uses for CT scans is in the diagnosis of disease and trauma. In the case of trauma, physicians often rely on CT scans for quick analysis of internal bleeding or injuries to organs such as the spleen. It can also show detailed images of skeletal injuries and how those injuries affect nearby muscles and tissues. These scans are used to view vessels for signs of diseases or conditions such as a blood clot in the lungs that may cause stroke or kidney failure. According to the Radiological Society of North America, physicians prefer to use CT scans over other methods to diagnose cancer. This is because the scan allows them to see the location of tumors and identify their size.
Procedures
Physicians may also use CT scans to assist with biopsies. A biopsy is a test to determine whether cells in a particular area of the body are cancerous. It requires the careful insertion of a needle into the area of interest to extract cells for analysis. Using a CT scan, the physician is better able to guide the needle to a particular area in the body such as the lungs, liver or pancreas. Another reason physicians may use a CT scan is to plan for a surgery.
Treatment
CT scans can also assist physicians in administering the best treatment for a patient. For example, after gastric bypass surgery or an organ transplant, the physician may use a CT scan to assess any complications. The Radiological Association of North America notes that physicians often use CT scans to help plan what kind of radiation or chemotherapy treatment may be needed. The detailed scans can also illustrate progress throughout cancer treatment and help physicians determine whether a tumor is responding to therapy.
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