Xiao-an Zhang and Inga Haedicke (IMAGE) University of Toronto Caption Assistant Professor Xiao-an Zhang and Ph.D. student Inga Haedicke have developed a new contrast agent that may help in developing effective stem and therapeutic cell treatments. Credit Ken Jones Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.