General Info

MarinaMarina Ivančić, DVM, DACVR is the staff veterinary radiologist for the Chicago Zoological Society at Brookfield Zoo. She completed her veterinary degree at the University of California, Davis. Following an internship in small animal medicine, surgery, and radiology, she completed a veterinary radiology residency at the University of Pennsylvania. She has been a diplomate of the American College of Veterinary Radiology (ACVR) since 2008.

Dr. Ivančić has spent much of her professional career devoted to advancing veterinary radiology in marine mammals. In 2008, she founded AquaVetRad, an international radiology consulting service for aquatic animals, and has been the National Marine Mammal Foundation and U.S. Navy Marine Mammal Program veterinary radiologist since 2011. She has authored numerous scientific publications and is a prolific presenter at international conferences. In 2016, she relocated to Chicago to join CZS in launching its Radiology Consulting Service.

Marina’s passion for animals grew from encounters with dolphins and other animals under professional care. Years later, as a veterinary student, she spent two summers volunteering with the U.S. Navy Marine Mammal Program. These experiences defined her ultimate professional goal of using medical imaging as a tool to enhance the well-being of animals in human care and conservation of animals in the wild.

Mail-Keeley-Sean-Outlook-(1).pngEric T. Hostnik, DVM,  MS, DACVR is an assistant professor at the Ohio State University with a special interest in zoo and wildlife species. He completed his veterinary education at the University of Florida, and ollowed additional training as an emergency clinician with companion animals and pocket pets at VCA South Shore Animal Hospital.

Dr. Hostnik completed his diagnostic imaging residency and Master’s program at the Ohio State University. His research interests focus on the use of CT, including the role of CT in zoo settings.

When not working, Dr. Hostnik enjoys the music and sports of Columbus, Ohio, as well as snowboarding and camping when home in Vermont. 

The mission of the Chicago Zoological Society’s  Veterinary Services Department is to provide a visionary  level of veterinary care to our patients, to inspire people  of all backgrounds, and to passionately advance the  professional standards for zoological medicine in a way  that positively impacts the conservation of wildlife and  nature. The department’s current programs focus on three core areas of strength: medical imaging, anesthesia and  analgesia, and veterinary education. 

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For More Information

E-mail us at or call (708) 688-8RCS.

The Chicago Zoological Society’s Radiology Consulting Service is supported in part by The Grainger Foundation.

©2019 Chicago Zoological Society. The Chicago Zoological Society is a private nonprofit organization that operates Brookfield Zoo on land owned by the Forest Preserves of Cook County.