vial of actinium-225 (IMAGE) DOE/Brookhaven National Laboratory Caption This long-exposure image makes it possible to see the glow of actinium-225, an isotope that shows great promise for treating cancer. Credit Brookhaven National Laboratory Usage Restrictions OK for use in stories about this research License Original 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.