Radiation oncology is concerned with the generation, conservation, and dissemination of knowledge concerning the causes, prevention, and treatment of cancer with particular emphasis on the role of ionizing radiation. A radiation oncologist administers radiation therapy - the use of high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources - to kill cancer cells and shrink tumors. Radiation may come from a machine outside the body (external-beam radiation therapy), or it may come from radioactive material placed in the body near cancer cells (internal radiation therapy). Systemic radiation therapy uses a radioactive substance, such as a radiolabeled monoclonal antibody, that travels in the blood to tissues throughout the body. Radiation therapy may also be called irradiation and radiotherapy. This information was adapted from the National Cancer Institute website.


  • Length of training: 5 years (including a PGY-1 year)
  • Match: NRMP
  • Application service: ERAS

Ohio State Department of Radiation Oncology

  • Department Chair: Arnab Chakravarti, MD
  • Residency Director: Raju Raval, MD
  • Residency Coordinator: Meg Decker, 614-293-3255
  • Education Director: Meng Welliver, MD
  • Medical Student Education Coordinator: 614-293-3255

Learn more about the Department of Radiation Oncology

Specialty Champions

  • Jose Bazan, MD
  • Dukagjin Blakaj, MD
  • Doug Martin, MD
  • Raju Raval, MD, DPhil
  • Meng Welliver, MD
  • Julia White, MD
  • Terence Williams, MD


AAMC Careers in Medicine: Radiation Oncology