I am astonished at the diagnostic accuracy of today’s radiologic technology. CAT scanners today, for example, can detect lesions that were invisible 5 or 10 years ago. As a gastroenterologist, I am routinely referred patients with subtle abnormalities seen in their livers, pancreases and digestive tract. Indeed, every medical specialty has been similarly affected. Pulmonary specialists see patients with tiny lung nodules that would not have been seen with older technology. Oncologists see patients with borderline abnormalities that can only be detected with the latest generation of scanners. Shouldn’t we celebrate this futuristic diagnostic accuracy? I’m not so sure. I believe that these phenomenal technologies harm many more patients than they save. Follow my reasoning. Most of the abnormalities that scans detect today are innocent lesions that will never make a patient sick. Our internal organs are not smooth and perfect. New scanners, like the satellites in space mentioned in the pr
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