Robert D. Timmerman, M.D., FASTRO, FACR, is Professor and Chair of Radiation Oncology, Professor of Neurosurgery, and Effie Marie Cain Distinguished Chair in Cancer Therapy Research. His primary practice involves the treatment of adult and children with brain tumors.

Dr. Timmerman graduated from Iowa State University with a bachelor's degree in nuclear engineering and a master's degree in reactor physics from the University of Tennessee. After finishing medical school in his home state of South Dakota, he completed a residency in radiation oncology at The Johns Hopkins Hospital. He was the principal investigator or co-investigator on several prospective trials designed to evaluate the efficacy and toxicity of stereotactic body radiation therapy in lung, liver, spine, and pelvic sites. He is the national principal investigator of Radiation Therapy Oncology Group (RTOG) trials using this therapy in patients with early stage lung cancer.


Graduate School
University of Tennessee at Knoxville (1986)
Other Post Graduate Training
University of Tennessee at Knoxville (1986)
Medical School
University of South Dakota (1990)
McKennan Hospital (1991), Transitional Year
Johns Hopkins School of Medicine (1994), Radiation Oncology

Research Interest

  • Effect of SAbR on immune function and immunotherapy
  • Hypofractionated Radiation Therapy
  • Radiation Response Modifiers
  • Stereotactic Body Radiation Therapy


Featured Publications LegendFeatured Publications

Local Surgical, Ablative, and Radiation Treatment of Metastases
Timmerman, RD, Bizekis, CS, Pass HI, Fong, Y, Dupuy, DE, Dawson, LA, and Lu, D CA - A Journal for Clinicians May 2009 59(3)
A phase I trial of temozolomide and lomustine in newly diagnosed high-grade gliomas of childhood.
Jakacki RI, Yates A, Blaney SM, Zhou T, Timmerman R, Ingle AM, Flom L, Prados MD, Adamson PC, Pollack IF Neuro-oncology 2008 Aug 10 4 569-76
Universal survival curve and single fraction equivalent dose: useful tools in understanding potency of ablative radiotherapy
Park C, Papiez L, Zhang S, Story M, Timmerman RD Int J Radiat Oncol Biol Phys 2008 70(3) 847-52
Stereotactic body radiation therapy in multiple organ sites
Timmerman RD, Kavanagh BD, Cho LC, Papiez L, Xing L J Clin Oncol 2007 25(8) 947-52


Featured Books Legend Featured Books

Stereotactic Body Radiation Therapy

Brian Kavanagh and Robert Timmerman (Ed.) (2005). Baltimore, MD, Lippincott, Williams, and Wilkins

Image Guided and Adaptive Radiation Therapy

Robert Timmerman and Lei Xing (Ed.) (2009). Baltimore, MD, Lippincott, Williams, and Wilkins

Treating Tumors that Move with Respiration

Urschel HC, Luketich JD, Papiez L, Timmerman R (Ed.) (2007). New York, NY, Springer Science & Business Media

IMRT, IGRT, SBRT - Advances in the Treatment Planning and Delivery of Radiotherapy

Meyer J, Kavanagh B, Timmerman R (editors) (Ed.) (2007). Basal, Switzerland, Karger

Honors & Awards

  • Alpha Omega Alpha
    1989 (0)
  • The Best Doctors in America
    1998-2005 (0)

Professional Associations/Affiliations

  • American College of Radiology
  • American Society for Therapeutic Radiology and Oncology
  • Radiation Therapy Oncology Group
  • Society for Neuro-Oncology
  • The Children′s Cancer Group and The Children′s Oncology Group