Hospitals and radiology practices around the United States have increasingly begun using high-tech CT scans to screen people for lung cancer despite intense disagreement about whether the testing should be done widely and, if so, who should undergo the exams.

The trend was triggered by a recent federal study, which found that screening certain heavy smokers and ex-smokers could slash their chances of dying from lung cancer. The finding was hailed as one of the most important advances in decades toward reducing the toll from the nation’s leading cancer killer... Read More