(FORTUNE Small Business) – When Oran Muduroglu co-founded Stentor, hospitals were printing digital X-rays and hand-delivering them to doctors. "People didn't have the infrastructure to move these 500-megabyte files around," says Muduroglu, 43. Stentor developed software to let doctors access and examine X-rays from a PC, even at home. Muduroglu, who owns about 5% of the Brisbane, Calif., company, expects revenue from its more than 150 clients--including Kaiser Permanente and several VA hospitals--to hit $50 million this year, up from about $35 million in 2004. In July the Dutch giant Royal Philips Electronics agreed to buy Stentor for $280 million in cash. "I've never been so happy to cancel a vacation," says Muduroglu, who will serve as general manager of the Stentor unit at Philips. He adds, "I'll get in trouble with my wife for that." --IAN MOUNT