Dr. Chang is Professor and Vice-Chairman of Radiology Informatics and Medical Director of Pathology Informatics at the University of Chicago School of Medicine. Dr. Chang is also Medical Director of Enterprise Imaging and the Informatics Architect for the Service Oriented Architecture (SOA) initiative at the University of Chicago Hospitals.
Dr. Chang is active in numerous research and development projects related to imaging informatics as well as enterprise-wide informatics integration issues. He is a recognized expert in the field of imaging informatics. His work in workstation design has resulted in presentation and navigation models that have been adopted by most PACS vendors. A system co-invented by Dr. Chang was commercialized via the creation of Stentor PACS, which was acquired by Philips Medical Systems. This PACS system is used by several hundred hospitals worldwide and currently is second in worldwide market share.