Label-free Imaging Workflow (IMAGE) Morgridge Institute for Research Caption A novel label-free imaging technique differentiates T cells from blood when in a quiescent state (illustrated in blue) and when activated by antibody-stimulation (illustrated in red). Images are captured using a microscope paired with an infrared laser to capture autofluorescence of proteins involved in cellular metabolism. Credit Image courtesy of Alexandra Walsh. 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.