Lung cancer: To scan or not to scan?

Those with a 30 pack-year history, i.e. have smoked a pack a day for 30 years or two packs a day for 15 years and so on, are recommended to get a low dose CT scan to look for lung cancer. — Reuters

Bettye Givens didn’t know that low-dose CT scans can catch lung cancer at its earliest, most treatable stages.

She didn’t know that they can also throw up false positives that lead to more invasive and risky follow-up tests.