Centaur Diagnostics Inc. herded up interest in its gamified system for labeling medical data for use in artificial intelligence (AI) applications. The Boston-based company raised $12 million in a series A round that will help Centaur build out its crowdsourced system for labeling medical images, videos, text and audio recordings. The round brings the company’s funds raised to date to $15 million. Matrix Partners led the charge along with Accel Partners, Global Founders Capital, Susa Ventures, and Y Combinator.