Glowing Tumos (IMAGE) Johns Hopkins Medicine Caption Radiolabeled protein lights up tumor implanted in the arm of a mouse under a PET scan. The researchers hope to use scans like this one to to calculate in real time how much of an immunotherapy drug reaches a tumor and what parts of a cancer remain unaffected. Credit Sridhar Nimmagadda 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.