Study: CT scans reduce lung cancer death rates

A new study shows CT scans can reduce the lung cancer death rate among smokers by 20 percent.

Researchers say CT scans can detect lung cancer much earlier than chest X-rays when it's still curable. Currently only 15 percent of those diagnosed survive.

Right now, there are no official guidelines, but researchers recommend a CT scan for anyone who has been smoking for more than 20 years, even if they quit as many as 15 years ago.