The optical spectroscopic technique uses laser illumination to identify the infiltrative edges of glioblastoma tumors in the brain, helping to inform resection surgery.SILVIA NOBLE ANBUNESAN, ALBA ALFONSO-GARCIA, AND LAURA MARCU, UNIVERSITY OF CALIFORNIA, DAVISFluorescence lifetime imaging (FLIm) is an optical spectroscopic technique that is well suited to interrogating biological tissues in vivo. By measuring the time-resolved fluorescence properties intrinsic to tissues, FLIm can distinguish between areas of different metabolic activity and structural composition. This becomes particularly significant when plotting intervention for cancers such as glioblastoma, the most aggressive form of brain cancer. 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