And Virtual Colonoscopies
BY LAURA STEPHENSON CARTER
When it comes to interpreting the results of virtual colonoscopies, radiologists “have a hard time taking the advice of computer aids,” said senior investigator Ronald Summers, chief of the NIH Clinical Center’s Clinical Image Processing Service. Computer-aided-detection (CAD) technology is more effective than humans at finding tiny bumps on the scan that represent polyps, but it identifies mock polyps, too. Radiologists have a hard time telling the difference between the true and false findings. Summers suspected perceptual errors were to blame and that CAD systems needed to be improved. He used crowdsourcing to recruit participants for his study.
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