2017 ASTRO Annual Meeting Logo (IMAGE) American Society for Radiation Oncology Caption 2017 ASTRO Annual Meeting logo. Credit American Society for Radiation Oncology (ASTRO) Usage Restrictions Image may be used with appropriate caption or 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.