News Release

ASTRO and ACR update practice parameters for radiation therapy treatments

Business Announcement

American Society for Radiation Oncology

The American Society for Radiation Oncology (ASTRO) and the American College of Radiology (ACR) recently released seven updated practice parameters for medical providers who use radiation therapy to treat patients with cancer. The updated practice parameters synthesize the clinical best practices that describe recommended procedures and considerations for the safe delivery of radiation in specific areas of clinical practice. The joint Practice Parameters and Technical Standards are available for download online.

Three practice parameters were developed by ACR and ASTRO:

Four additional practice parameters, which focus on the medical use of specific radioactive sources, were developed in collaboration with the American College of Nuclear Medicine (ACNM), the Society of Nuclear Medicine and Molecular Imaging (SNMMI), the American Brachytherapy Society (ABS), the Society for Pediatric Radiology (SPR) and the Society of Interventional Radiology (SIR):


ACR and ASTRO previously issued joint practice parameters for proton beam radiation therapy and radiation oncology in 2018, and for total body irradiation in 2017.


The American Society for Radiation Oncology (ASTRO) is the world's largest radiation oncology society, with more than 10,000 members who are physicians, nurses, biologists, physicists, radiation therapists, dosimetrists and other health care professionals who specialize in treating patients with radiation therapies. The Society is dedicated to improving patient care through professional education and training, support for clinical practice and health policy standards, advancement of science and research, and advocacy. ASTRO publishes three medical journals, International Journal of Radiation Oncology * Biology * Physics, Practical Radiation Oncology and Advances in Radiation Oncology; developed and maintains an extensive patient website, RT Answers; and created the nonprofit foundation Radiation Oncology Institute. Learn more at

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