A simple, inexpensive computer tool that measures volume changes in the size of suspicious nodules in the lungs picked up by a CT scanner can rule out non-cancerous ones with almost perfect accuracy and enable doctors to diagnose true cancers with fewer, less expensive and less invasive tests. The new diagnostic guidelines are described in a paper published yesterday in the New England Journal of Medicine on the progress of large European lung cancer CT screening trial (NELSON) launched in the Netherlands and Belgium in 2004...
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