Since 2004, the National Cancer Institute has been conducting trials to see if CT scans (and standard chest X-rays) can reduce mortality in smokers by detecting lung cancer early.

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Additionally, I have a chest x-ray every six months or so and a yearly CT scan.

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Then, in October, a CT scan showed that the tumor deposits in her left lung and chest and lymph nodes had grown substantially.

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When cardiac CT angiography is being used appropriately -- meaning, for example, in people with chest pain suggesting blocked heart arteries, rather than as a screening test for people with no symptoms of heart disease -- the benefits far outweigh the risk of the radiation, according to Einstein and Hausleiter.

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