A study of more than 27,200 mammograms taken over three years concludes that computer-aided detection, or CAD, systems help health care providers detect more cancers in the breast and, particularly, smaller tumors at an earlier stage in younger women. The cancer detection rate increased by 16.1%, and rates of detection of small, lump-forming cancers of 1 centimeter or less were 164% higher compared with the pre-CAD time period.

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