Google says it is deeply involved in developing artificial intelligence, or AI, to help doctors identify and treat disease. The company previously announced successful tests of machine learning systems designed to assist doctors. In one case, Google reported AI had examined images to diagnose diabetic eye disease with equal accuracy to doctors. Other tests showed that machine learning can be used to study massive amounts of patient data to predict future medical events. Now the company has published two new studies showing a high level of success in identifying one of the deadliest forms of cancer. Google carried out tests with researchers from the Naval Medical Center San Diego. Google reported the findings on its AI website and results were also published in scientific journals.