ASTRO Logo (IMAGE) American Society for Radiation Oncology Caption This is the American Society for Radiation Oncology (ASTRO) logo. Credit American Society for Radiation Oncology (ASTRO) 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.