Comparison (IMAGE) Massachusetts General Hospital Caption This is a contrast-enhanced MR abdominal image showing the abdominal aorta, renal arteries and kidneys of a baboon made with manganese-based agent Mn-PyC3A (left) shows comparable detail to an image of the same animal made using a gadolinium-based contrast agent (right). Credit Eric Gale, PhD, Martinos Center for Biomedical Imaging, Massachusetts General Hospital. Usage Restrictions Usage restricted to coverage of this news release. 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.