Photoacoustic Microscope (IMAGE) California Institute of Technology Caption Terence T. W. Wong, first author of the May 17 Science Advances paper, adjusts a photoacoustic microscope at the Caltech Optical Imaging Laboratory. Credit Caltech Usage Restrictions For use in news stories only 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.