A doctor works with a patient in a CT scanner at Southern New Hampshire Medical Center in Nashua, N.H. New lung-cancer screening guidelines recommend annual scans but only for an older group of current or former heavy smokers. The guidelines were published online Sunday in the Journal of the American Medical Association. (Associated Press)

A doctor works with a patient in a CT scanner at Southern New Hampshire Medical Center in Nashua, N.H. New lung-cancer screening guidelines recommend annual scans but only for an older group of current or former heavy smokers. The guidelines were published online Sunday in the Journal of the American Medical Association. (Associated Press)