[[{“type”:“media”,“view_mode”:“media_large”,“fid”:“”,“attributes”:{“class”:“media-image alignright size-full wp-image-4882”,“typeof”:“foaf:Image”,“style”:“”,“width”:“100”,“height”:“100”,“title”:“NPR logo”,“alt”:“NPR logo”}}]]Long-awaited results from a big federal study show that screening smokers and former smokers with CT scans cuts the risk of dying from lung cancer by 20 percent. But many questions remain about how these findings should be applied to more than 90 million Americans who smoke or once did. In this story, Dr. William C. Black, professor of community and family medicine at Dartmouth Medical School and director of chest radiology at Dartmouth-Hitchcock Medical Center, is asked what the study means and what questions still remain.

Listen to or read the transcript of the story, aired on NPR’s Morning Edition on 11/5/10.