Nanosensor (IMAGE) UT Southwestern Medical Center Caption The nanosensors lit up on this image show cancer tissue at the microscopic level. The blue background is muscle tissue. Credit UT Southwestern 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.