Exposure to high radiation doses from computed tomography scans during childhood account for approximately 4,870 future cancers each year in the U.S., according to a study in the journal JAMA Pediatrics. Researchers said that reducing the highest 25% of radiation doses and avoiding unnecessary scans could prevent 43% and 62% of these future cancers, respectively. The use of CT scans for children 15 and younger fell slightly between 2006 and 2010 after nearly tripling in the previous 10 years.

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