Microbubbles Under An Optical Microscope (IMAGE) California Institute of Technology Caption Medical grade albumin encapsulated gas microspheres are imaged with a 20X microscope. Credit Haowen Ruan, Mooseok Jang, and Changhuei Yang/Caltech 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.