CBS New York

Published: Jun 24, 2014 5:02 PM EDT

CHICAGO (AP) - A new study says 3-D mammograms may be better at finding cancer than regular scans, but whether that means saving more lives isn't known.
    
The study involved almost half a million breast scans. More than one-third used relatively new 3-D imaging along with conventional scans. The rest used regular mammograms alone.
    
The 3-D combo detected one additional cancer per 1,000 scans, compared with conventional mammograms. There were also 15 percent fewer false alarms.
    
But the study wasn't designed to determine whether the combined 3-D scans resulted in better long-term outcomes.
    
Still, the researchers say their results are promising.
    
The study was published Tuesday in the Journal of the American Medical Association.

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