Today’s patient has 2-inch fangs, a glossy golden-brown coat and a triangular, petal-pink nose. Dongwa the clouded leopard lies fully anesthetized in the CT scanner, his tongue lolling, as Brookfield Zoo radiologist Marina Ivancic scrolls through the 3-D rendering of his insides on her computer screen. “Right lung, left lung, aorta, liver, gall bladder,” she narrates, as she makes the virtual journey through the cat’s thoracic cavity and down into his abdomen. She calls up an image of the 40-pound cat’s muscular exterior, and then, with a few quick drags on her computer touchpad, she makes the muscle fall away, and you see the curves and angles of ghost-white bone. Dongwa is the big attraction today, with vets and veterinary students clustered at his side, but it’s actually Ivancic, zoo officials say, who is one of a kind. She is the only board-certified veterinary radiologist working full time at a North American zoo, according to Michael Adkesson, vice president of clinical medicine at the Chicago Zoological Society, which operates Brookfield Zoo. Hired last June, Ivancic helps diagnose animals at Brookfield and serves as a consultant to zoos and aquariums worldwide, analyzing scans sent in from as far away as Australia and Hong Kong. “I’m humbled every day that I get to do this for a living — which is nuts,” she said. “People would do anything to touch one of these animals just once. There’s always some new thrill or some new species — some beautiful little animal that (may be) pregnant. The other day I looked at a little tamandua — a tiny anteater. They’re gorgeous animals, and I was looking at her belly with the ultrasound while she was eating these nasty little worms that she loves so much, and they’re wiggling around, and she’s chewing on them and paying no attention to the fact that I’m looking at her.” Ivancic has quickly carved out a niche for herself — recent patients include a penguin, a snow leopard and a kangaroo. She’s also analyzing images sent in by other zoos, in a fee-for-service arrangement that Adkesson described as a win-win. “It’s so easy to move these images (online) and her expertise can help everyone,” he said. “We’re hoping to not just