April 9, 2007 - According to the New England Journal of Medicine, computerized mammography, currently used for about a third of the nation's mammograms, are more frequently finding harmless spots for unknowing patients.
The computerized method showed no clear capability to find more cancer cases than unaided readings: four cancers were found for every 1,000 mammograms, meaning that CAD would give 156 more unneeded callbacks and 14 more biopsies for every additional cancer it finds.
The researchers in the five-year study, backed by the federal government and the American Cancer Society, analyzed mammograms from medical centers in Washington state, Colorado and New Hampshire, seven of 43 centers used CAD. The mammograms came from 222,135 women and included 2,351 with a cancer diagnosis within a year of their tests.