Tianrui with system (IMAGE) Optica Caption Researchers have created a photoacoustic imaging endoscope probe that can fit inside a medical needle with an inner diameter of just 0.6 millimeters. Tianrui Zhao, first author of the paper is shown holding the imaging probe. Credit Tianrui Zhao from King’s College London Usage Restrictions None License Original 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.