Radiation Oncology Residency Program

The Radiation Oncology Residency Program is an ACGME-accredited four-year radiation oncology residency. The principle objective of our training program is to provide a strong, progressive clinical experience in radiation oncology along with the very necessary basic science and research support.  The training is provided by a combination of supervised clinical experiences, seminars, lectures and research assignments designed to expand the trainee’s clinical skills and to provide a broad scientific basis for growth.  The trainee’s rotation to various segments of the program follow a pattern of progressively increasing responsibility throughout the four year post internship training.

Find information about our residency program, including curriculum, application requirements and much more.

Charles R. Thomas, M.D.

Dr. Thomas is Professor and Chair of OHSU’s Radiation Medicine Department and an active member of the Knight Cancer Institute. He joined the OHSU faculty in November 2005. He received his medical degree from the University of Illinois College of Medicine and is trained in medical oncology and radiation oncology. He has obtained triple-board certification in Radiation Oncology (American Board of Radiology), Medical Oncology and Internal Medicine (American Board of Internal Medicine). He is a member of the National Cancer Institute’s Rectal-Anal Cancer Task Force.

Jerry Jaboin, M.D., Ph.D.

Dr. Jaboin is Associate Professor and the Vice-Chair of the OHSU Radiation Medicine Department. He received his medical and doctorate degrees from Howard University.  His clinical research and expertise is on the treatment of pediatric and adult brain tumors and he has lead the programmatic development of the OHSU’s pediatric and central nervous system radiation oncology programs.

Aaron Grossberg, M.D., Ph.D.

Dr. Grossberg is an assistant professor of radiation medicine. He completed his medical and doctorate degrees at OHSU before completing his residency training in radiation oncology at MD Anderson Cancer Center. Dr. Grossberg’s practice focuses on cancers of the pancreas and breast.

Arthur Hung, M.D.

Dr. Hung is an assistant professor of radiation medicine and serves as Medical Director of the Radiation Therapy Training Program. He received his medical degree at The Ohio State University. Dr. Hung joined the faculty in 2002 after completing his residency at the University of Texas – MD Anderson Cancer Center.

John Holland, M.D.

Dr. Holland is an associate professor of radiation medicine and serves as the Medical Residency Associate Program Director. He received a medical degree from Washington University in St. Louis. He has been part of OSHU’s medical staff since 1994.  He was selected as the 'Outstanding Faculty Teacher Award' recipient by OHSU’s residents in 2006 and 2007.

Joshua Walker, M.D., Ph.D.

Dr. Walker is an assistant professor of radiation medicine. He received his master’s and doctorate degrees from OHSU. After completing his residency in 2018, he joined the radiation medicine faculty.

Nima Nabavizadeh, M.D.

Dr. Nabavizadeh is an assistant professor of radiation medicine and serves as the Medical Residency Program Director and Medical Student Clerkship Director. He received his medical degree from University of Oklahoma College of Medicine and was an inductee to the Alpha Omega Alpha honors society for medical academic excellence.  He also holds a degree in Mechanical Engineering from the University of Oklahoma.  After completing his residency in 2016, he joined the radiation medicine faculty.

Reid F. Thompson, M.D., Ph.D.

Dr. Thompson is an assistant professor of radiation medicine and a member of the Knight Cancer Institute’s Computational Biology Program.  He received his medical and doctorate degrees from the Albert Einstein College of Medicine and trained at the University of Pennsylvania. He also holds degrees in genetics and biophysical chemistry. He joined the Portland Veterans Affairs Medical Center and OHSU faculties in 2016.

Shushan Rana, M.D.

Dr. Rana is an instructor of radiation medicine. He received his medical degree from University Health Science Center San Antonio. He completed his internship training in internal medicine at Providence Portland Medical Center in and completed his radiation medicine residency training at OHSU in 2018.

Timur Mitin, M.D., Ph.D.

Dr. Mitin is Associate Professor of Radiation Medicine and serves as Medical Director Tuality/OHSU Cancer Center in Hillsboro, Oregon. Dr. Mitin was born in Moscow, Russia and came to the United States at 16.  He received his medical and doctorate degrees from Tufts University and completed his residency training at the Harvard Radiation Oncology Program. He joined the radiation medicine faculty in 2014 from Massachusetts General Hospital.

Program Director

Nima Nabavizadeh, M.D.

Dr. Nima Nabavizadeh serves as the Medical Residency Program Director and Medical Student Clerkship Director. He received his medical degree from University of Oklahoma College of Medicine and was an inductee to the Alpha Omega Alpha honors society for medical academic excellence.  He also holds a degree in Mechanical Engineering from the University of Oklahoma.  After completing his medical residency at OHSU in 2016, he joined the Radiation Medicine faculty.

Dr. Nabavizadeh specializes in caring for people with lymphoma and gastrointestinal cancers. Learn More