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Tuesday, November 6, 2012. The results of a study reported on October 26, 2012 in the journal Carcinogenesis suggest that administration of the antioxidant amino acid N-acetylcysteine (NAC) could help protect men and women at risk of lung cancer from the cancer-promoting effects of computed tomography (CT) screening. Annual CT screening of heavy current and former smokers who are at high risk of developing lung cancer was found to reduce lung cancer mortality by 20 percent in comparison with screening with chest x-rays in a recent trial. However, a concern has been raised regarding the risks associated with the relatively high amount of radiation delivered by CT scans, which could induce cancer in normal cells or promote the growth of precancerous cells.
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