PET Scans (IMAGE) University of Copenhagen - Niels Bohr Institute Caption The images show PET scans of a mouse with a large tumor (by the white arrow). The tumor is treated with nanoparticles, which are injected directly into the tumor and are then flashed with near infrared laser light. The laser light heats the nanoparticles, thus damaging or killing the cancer cells (red arrows). Credit (Credit: Kamilla Nørregaard and Jesper Tranekjær Jørgensen, Panum Inst.) Usage Restrictions (Credit: Kamilla Nørregaard and Jesper Tranekjær Jørgensen, Panum Inst.) 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.