As colorectal cancer climbs among younger Americans, the reliability of colonoscopy has long depended on an uncomfortable variable: the individual physician performing it. Researchers at Northwestern Medicine have answered this persistent inequity with an artificial intelligence system capable of reviewing thousands of procedure recordings and measuring quality with the precision of a trained human observer — at a scale no human could sustain. The development arrives at a moment when medicine is learning, sometimes painfully, that the tools meant to sharpen clinical practice can also quietly e