CT scans detect lung cancer early

http://www.webmd.com/content/article/129/117275.htm?printing=true

The use of spiral computed tomography (CT) imaging has shown potential in the early detection of lung cancer. Lung cancer is an extremely dangerous form of cancer that leads to death in approximately 90% of patients diagnosed with the disease. Routine CT tests would be able to identify lung cancer in the early stages of progression, when the disease is treatable. The article also discusses some possible detrimental effects including over-diagnosis.