ASTRO is the premier radiation oncology society in the world, with more than 10,000 members who are physicians, nurses, biologist, physicists, radiation therapists, dosimetrists and other health care professionals who specialize in treating patients with radiation therapies. These medical professionals, found at hospitals, cancer treatment centres and academic research facilities around the globe, make up the radiation therapy treatment teams that are critical in the fight against cancer. Together, these teams treat more than one million cancer patients each year. As the leading organization in radiation oncology, the Society is dedicated to improving patient care through professional education and training, support for clinical practice and health policy standards, the advancement of science and research and advocacy. ASTRO provides members with the continuing medical education, health policy analysis, patient information resources and advocacy that they need to succeed in today’s ever-changing health care delivery system.