But how often should people be scanned? "The current thought is that if you have a normal first exam, doing an annual exam would be satisfactory," Machnicki noted. "Whether or not longer intervals would be effective has not been tested."
Aggressive cancers may start and grow so quickly that they may be impossible to detect at a curable stage with any current technology, experts say.
Because this study was presented at a medical meeting, the data and conclusions should be viewed as preliminary until published in a peer-reviewed journal.
Learn more about screening for lung cancer from the U.S. National Cancer Institute.
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