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Department of Radiation Oncology

The University of Washington Department of Radiation Oncology is led by innovators and visionaries in the field of cancer care. It produces some of the finest radiation oncologists in the nation.

A Brief History of Excellence

The University of Washington School of Medicine Department of Radiation Oncology was formed in 1979, an amalgam of three divisions: radiation oncology, radiation biology and medical physics.  However, the Department’s research and innovation had been established years before in the early 1970s when National Institutes of Health funding was received to study cyclotron-generated fast neutron beams.

Today, the three divisions remain; we’ve added a fourth division, radiation chemistry, and the studies on the Cyclotron led to the establishment of its own center, including the UW Medical Cyclotron Facility.  The education program has grown to include accredited residency programs in both medical radiation oncology (physicians) and medical physics (physicists), two newly established medical fellowships in stereotactic radiation therapy and proton therapy, and several post-doctoral research positions.

The Department has 25 physician faculty, 20 physicists and research faculty, and 5 ARNP/PA faculty.  The training programs include 9 radiation oncology residents, 4 medical physics residents, 2 senior fellows, several postdoctoral fellows, and graduate students participating in various research projects in radiation biology and molecular medicine, medical physics, and radiation chemistry.

The UW Department of Radiation Oncology is committed to fulfilling, specific to radiation oncology, UW Medicine’s mission to improve the health of the public by:

  • Advancing medical knowledge;
  • Providing outstanding primary and specialty care to the people of the region;
  • Preparing tomorrow’s physicians, scientists, and other health professionals; and
  • Continuing the legacy of the UW School of Medicine, which is widely known for high-quality, cost-effective education.

A core value for the department is to bring an innovative, caring, comprehensive and collaborative approach to each of our service areas: Clinical Care, Education, and Research.

Clinical Care

We have explored and invested in advanced radiation therapy technologies.  We are the only radiation oncology facility in North America which offers the widest range of radiation therapy modalities. Beyond the commonly used Photon and Electron radiation, we offer both particle therapies to our patients: Neutrons, which have a higher effectiveness against certain types of cancer; and Protons, which have a unique ability to better protect normal tissues near the tumor from the radiation beam.  Having assembled a talented, specialized team of physicians and other providers, we are able to offer a complete spectrum of radiation therapy options for a wide range of cancers, including extremely rare cancers.

The University of Washington is recognized as one of the country’s premier cancer centers.  We are a member institution of the National Comprehensive Cancer Network (NCCN) and our faculty members contribute to NCCN guidelines.  We are affiliated with the Fred Hutchinson Cancer Research Center, which pioneered bone marrow transplantation and whose faculty have won three Nobel prizes.

UW Medicine, together with Fred Hutch, Seattle Children’s and Seattle Cancer Care Alliance form the only NCI-designated Comprehensive Cancer Center in the Northwest. This group of organizations is one of the top-funded cancer centers in the country and is ranked fifth in the nation by U.S. News & World Report for 2017-18.


The goal of our educational programs is to train future leaders in the field of radiation oncology and medical physics.  Residents receive outstanding training in clinical radiation oncology, treatment planning, radiation physics, and radiobiology, enabling graduates to provide comprehensive patient care and QA activities.  All our residents conduct substantive research in clinical radiation oncology, translational science, education, and health services, including safety and quality improvement.

Residents rotate through several sites in the UW Medicine system and receive clinical training in all aspects of radiation oncology.  They become adept in diverse radiation therapy modalities, including photons, protons, neutrons, electrons, low dose rate and high dose rate brachytherapy, stereotactic radiosurgery with the Gamma Knife, stereotactic body radiation therapy, intraoperative radiation therapy using a Mobetron unit, and intravascular therapy.


The department has active research programs in particle therapy, integration of advanced imaging into radiation therapy practice, fundamental radiation biology, and medical physics topics such as Monte Carlo, multi-objective  optimization, tumor response modeling, synthetic diamond detectors, smARTsKin, decision theory, patient safety, and experimental therapy proton irradiator.  In addition, we are enrolling patients on trials with cooperative groups including NRG, Alliance, COG, and PCG.

Resident Research Days and Faculty Research Retreats encourage research and collaboration within and outside the department.


In addition to the faculty, the department is fortunate to have the resources of dedicated and highly experienced professionals to provide clinical radiation care and assist those who visit us in person, by phone, or via our website.

Ramesh Rengan, MD, PhD, FASTRO

Professor and Interim Chair

Dr. Rengan joined the department as its Interim Chair in December 2018. Dr. Rengan is the Medical Director of the SCCA Proton Therapy Center and Member of the Integrated Immunotherapy Research Center at the Fred Hutchinson Cancer Research Center.

Department Happenings

Seattle Magazine Top Docs

The April 2020 issue of Seattle magazine names 4 UW Medicine radiation oncologists as Top Doctors.

New Department of Radiation Oncology Chair

Dr. Ramesh Rengan has been selected to serve as the Chair at the University of Washington School of Medicine (UWSOM) – Department of Radiation Oncology effective April 16, 2020.

Dr. Kristi Hendrickson elected as Fellow of the American Association of Physicists in Medicine

Congratulations to Dr. Kristi Hendrickson who was elected as a Fellow of the American Association of Physicists in Medicine!

Pacific Northwest Workshop on Methods in Radiation Oncology Clinical Trials

The University of Washington School of Medicine Department of Radiation Oncology and the Oregon Health & Science University School of Medicine Department of Radiation Medicine are proud to host the Pacific NW Radiation Oncology Clinical Trials Workshop in 2021.

Please save the date May 6th – 8th, 2021

Advisory Committee

Ramesh Rengan, MD, PhD, FASTRO

Professor and Interim Chair

Jason K. Rockhill, MD, PhD


Waylene Wang, MD

Clinical Assistant Professor

Kenneth Russell, MD


Berit Madsen, MD

Associate Professor

Jing Zeng, MD

Associate Professor

Ralph Ermoian, MD

Associate Professor

Tony Quang, MD, JD

Associate Professor

Edward Kim, MD

Associate Professor

Janice Kim, MD

Associate Professor

Eric Ford, PhD, FAAPM

Professor and Interim Director, Medical Physics

Lia Halasz, MD

Associate Professor

Kristi Hendrickson, PhD, DABR

Associate Professor

Smith “Jim” Apisarnthanarax, MD

Associate Professor

Anita Wharton, MPH