Label-free Microscopy (IMAGE) Allen Institute Caption Using 3D images of fluorescently labeled cells, Allen Institute researchers used machine learning to find structures inside living cells without fluorescent labels, using only black and white images generated by an inexpensive technique known as brightfield microscopy. Credit Allen Institute 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.