Magnetic Resonance Angiography (VIDEO) Institute for Basic Science This video is under embargo. Please login to access this video. Caption Magnetic resonance angiography (MRA) showing anatomical details of blood vessels in the head of a beagle dog with the new PEG-IONCs contrast agent. Credit IBS 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.