Machine learning can also be applied to medical diagnosis, and with more reliable results than human doctors currently produce. Researchers at an Oxford hospital in the UK have developed AI technology that can diagnose scans for heart disease and lung cancer. Cardiologists currently use the timing of the heartbeat in scans to tell if there's a problem, but even the best doctors get it wrong in one out of every five cases. The AI system developed at the John Radcliffe hospital can diagnose much more accurately, picking up on details the doctors are unable to notice, and ruling out the risk of patients going home undiagnosed and suffering a heart attack, or unnecessary surgery taking place. They have also developed a similar AI system that looks for signs of lung cancer, detecting nodules on the organs and immediately identifying whether they are cancerous or not.