Google LLC’s health unit has hit the ground running in 2020, today detailing a homegrown artificial intelligence model that it says can identify breast cancer more accurately than human radiologists. The project is the fruit of transatlantic research collaboration. Google Health worked together with Cancer Research UK Imperial Centre, Northwestern University, Royal Surrey County Hospital and DeepMind, Google parent Alphabet Inc.’s AI development unit. The search giant taught the machine learning model to identify cancerous tissue by training it on anonymized mammograms from more than 91,000 women in the U.S. and...