Imaging probe (IMAGE) Optica Caption Researchers have developed a head-mounted photoacoustic microscope that can image the brain activity in freely moving mice. The probe can be removed after imaging, making long-term studies possible. Credit Lei Xi, Southern University of Science and Technology Usage Restrictions NA 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.