IMAGE (IMAGE) Kyoto University Caption When X-rays are irradiated onto tumor tissue containing iodine-carrying nanoparticles, the iodine releases electrons that break DNA and kill the cancer cells. Credit Mindy Takamiya/Kyoto University iCeMS Usage Restrictions Please display credit 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.