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Targeting Cancer Care


Who We Are

Radiation oncologists, medical physicists, dosimetrists, radiation therapists, radiation oncology nurses and nurse practitioners, biologists, physician assistants and practice administrators comprise ASTRO’s more than 10,500 members, making it the largest radiation oncology organization of its kind. These medical professionals, found at hospitals, cancer treatment centers 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 1 million cancer patients each year.

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.

About ASTRO Brochure 


ASTRO is dedicated to improving patient care through education, clinical practice, advancement of science and advocacy.


ASTRO consists of a Board of Directors, five standing councils, standing committees, and committees and subcommittees operating under the auspices of the standing councils. 

Society History

ASTRO was founded November 18, 1958, as a club by 58 radiation therapists who were looking for representation of their specialty. The Society is now representing more than 10,500 radiation oncology treatment team members and continues to grow.

Membership Demographics

ASTRO counts more than 10,000 radiation oncologists and professionals from other related occupations among its members. 

Contact Us Directory

More than 70 professionals work to support ASTRO's mission and its growing membership.

Careers at ASTRO

Our staff thrives on working together to promote and advance the field of radiation oncology to help people living with a diagnosis of cancer. Working toward such a worthwhile goal lends a real sense of purpose and meaning to the jobs we do.

Content last updated 2/6/2015
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