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CT Scans Found To Increase The Risk Of Cancer

by Medindia Content Team on  August 31, 2004 at 4:55 PM General Health News   - G J E 4
CT Scans Found To Increase The Risk Of Cancer
CT scans deliver much larger radiation doses to the organs than conventional X-rays. The effective dose delivered during a full-body CT scan is nearly 100 times that of a typical mammogram. A new study shows the risk of cancer death from a single full-body CT scan is just slightly less than the cancer death risk of atomic bomb survivors from Hiroshima and Nagasaki in Japan.
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The study also shows elective annual scans carry much higher risks. Based on anecdotal evidence, the scans are performed on asymptomatic people to identify a variety of diseases, such as colon and lung cancer and coronary artery disease. A 45-year-old person who had one full-body CT scan would have an estimated .08-percent lifetime cancer death risk. This percentage would produce cancer in one in 1,200 people. However, a person of the same age who has annual full-body CT scans for 30 years would accrue a lifetime risk of about 1.9 percent, or nearly one in 50.

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Researchers say the risk can be reduced by increasing time between scans or by starting at a later age. They add different CT scans produce different doses and, thus, different risks.
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