(IMAGE) Universidad Carlos III de Madrid Caption Researchers at the firm 4DNature and the Universidad Carlos III of Madrid are developing a new technology, called helical optical projection tomography, which improves biomedical diagnostic 3-D imaging. Credit uc3m 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.