Radiation Biology

Radiation biology is a primary concept underlying the practice of radiation oncology, and understanding the principles of radiation biology is essential for radiation oncologists to understand the effects of radiation therapy on the body. All radiation oncology residents are required to take a qualifying board exam on radiation biology. The study guide from the American Board of Radiology Qualifying Examination in Radiation and Cancer Biology is a comprehensive question and answer guide that provides guidance on the content that is tested on the exam. On this page, we have included high-yield radiation biology review lectures and two full radiation biology courses for radiation oncology residents to use in their studying on this topic.

Radiobiology Resources

New Radiation and Cancer Biology Study Guide Now Available through ASTRO Academy

ASTRO is excited to announce the launch of the new and updated Radiation and Cancer Biology Study Guide 2026, a comprehensive, web-based resource designed to strengthen foundational knowledge in radiobiology. The guide includes 32 topic chapters with multiple-choice questions to promote active learning and support preparation for the ABR Radiation and Cancer Biology written exam. This dynamic tool is ideal for trainees and practicing clinicians seeking to enhance their understanding of the biological principles underlying radiation therapy.