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Department of Radiation Oncology

Julian R. Perks, Ph.D. View profile as PDF

Julian R. Perks

Clinical Interests

Dr. Perks is a physicist whose clinical interests include stereotactic radiotherapy as well as radiosurgery planning and treatment delivery. In particular, he has been focusing on the commissioning and clinical integration of a new gamma-knife system for the treatment of intra-cranial lesions. He also is working to expand the department's intensity-modulated radiotherapy (IMRT) capabilities. Dr. Perks's research activities include the comparison of linear accelerator and gamma knife-based radiosurgery procedures, optimizing imaging protocols, and the retrospective analysis of cone beam CR predictive outcome models to develop data for UC Davis. As a researcher, he does not see patients.





Radiation Oncology

Center/Program Affiliation:


UC Davis Comprehensive Cancer Center
4501 X St., G-126
Sacramento, CA 95817
Driving Directions
Phone: 800-800--362-5566


Ph.D., University of Birmingham, Birmingham, England, 1996
B.Sc., University of Birmingham, Birmingham, 1993

Select Recent Publications:

Chen AM, Farwell DG, Luu Q, Donald PJ, Perks J, Purdy JA. Evaluation of the planning target volume in the treatment of head and neck cancer with intensity-modulated radiotherapy: what is the appropriate expansion margin in the setting of daily image guidance? Int J Radiat Oncol Biol Phys. 2011 Nov 15;81(4):943-9. Epub 2010 Oct 6.

Chen AM, Marsano J, Perks J, Farwell G, Luu Q, Donald PJ, Purdy JA. Comparison of IMRT techniques in the radiotherapeutic management of head and neck cancer: is tomotherapy "better" than step-and-shoot IMRT? Technol Cancer Res Treat. 2011 Apr;10(2):171-7.

Perks J, Turnbull H, Liu T, Purdy J, Valicenti R. Vector analysis of prostate patient setup with image-guided radiation therapy via kV cone beam computed tomography. Int J Radiat Oncol Biol Phys. 2011 Mar 1;79(3):915-9. Epub 2010 Jul 17.

Perks JR, Stanic S, Stern RL, Henk B, Nelson MS, Harse RD, Mathai M, Purdy JA, Valicenti RK, Siefkin AD, Chen AM. Failure Mode and Effect Analysis for Delivery of Lung Stereotactic Body Radiation Therapy. Int J Radiat Oncol Biol Phys. 2011 Dec 22. [Epub ahead of print]

Yi BS, Perks J, Houston R, Stern R, Purdy JA, Chen AM. Changes in position and volume of lung cancer target volumes during stereotactic body radiotherapy (SBRT): is image guidance necessary? Technol Cancer Res Treat. 2011 Oct;10(5):495-504.

Initial assessment of peripheral dose for image guided radiation therapy (IGRT) using cone beam CT, J Perks, J Lehmann, C Yang, R Stem, J Purdy Radiother Oncol. 2008 Dec;89(3):304-10

To see if Julian R. Perks is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).