(IMAGE) Johannes Gutenberg Universitaet Mainz Caption Researchers use the so-called color centers in diamonds, energized using green laser light, to develop an innovative diagnostic technique for brain tissue. Credit photo/©: Arne Wickenbrock, JGU Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.