Stereotactic Radiosurgery Experts at UCLA

Meet Our SRS Expert Team
The UCLA Department of Radiation Oncology, in conjunction with the Department of Neurosurgery, has been engaged in stereotactic irradiation for nearly 20 years.

Radiation Oncologists

Tania B. Kaprealian, MD, MBA

Tania Kaprealian, MD
Associate Professor

Dr. Tania Kaprealian is an Assistant Professor in the Department of Radiation Oncology at the David Geffen School of Medicine at UCLA.  She completed her medical degree and residency training in Radiation Oncology at the University of California in San Francisco.  Subsequently she practiced at the American University of Beirut Medical Center where she was an Assistant Professor and Program Director in their Department of Radiation Oncology before joining the University of California Los Angeles (UCLA) Radiation Oncology Department.  More


Nzhde Agazaryan, PhD, DABR
Professor of Radiation Oncology and Chief of Clinical Medical Physics

Dr. Agazaryan is a Professor of Radiation Oncology and the Chief of Clinical Medical Physics at the UCLA Radiation Oncology. He is also a Professor of Biomedical Physics Graduate Program. His appointment in the Department of Radiation Oncology involves research, teaching and clinical practice. His research and clinical interests include stereotactic radiosurgery (SRS/SRT), stereotactic body radiotherapy (SBRT), small field dosimetry, image-guided radiotherapy (IGRT), functional image-guided radiotherapy, gated radiotherapy, eye plaque brachytherapy.  More


Minsong Cao, PhD, DABR
Assistant Professor

Dr. Cao received his PhD in Medical Physics from Purdue University in 2007.  Prior to joining UCLA, he was appointed as an Assistant Professor in the Department of Radiation Oncology at the Indiana University. He is certified by the American Board of Radiology in radiation therapy physics. His research interests include image guidance in radiation oncology, functional and physiological imaging and stereotactic body radiation therapy. More

Phillip Chow

Phillip Chow, M.S., DABR
Medical Physicist

Phillip Chow graduated from UCLA with a Bachelor of Science degree in Physics in 1990.  While attending graduate school in Astrophysics, he began working as a Medical Dosimetrist in 1992.  He received his certification from the Medical Dosimetrist Certification Board (MDCB) in 1995.  He then moved to Bangor, Maine in 1996 where he worked for two years as a Certified Medical Dosimetrist before being offered a position at Kaiser Permanente in Southern California.   More

Chul Lee, MS, DABR

Chul Lee, MS, DABR
Medical Physicist

Chul Lee has been working as a medical physicist at UCLA Radiation Oncology since January 2006. He obtained Master's degree in Medical Physics from Medical College of Ohio in December 2005. Prior to coming to UCLA, he worked as a researcher in radiochemistry laboratory for ten years at University of Michigan – Ann Arbor.  More

 Steve Tenn, PhD, DABR

Steve Tenn, PhD, DABR
Assistant Professor

Stephen Tenn joined the UCLA Department of Radiation Oncology in November of 2008. He received his PhD from the UCLA Biomedical Physics Graduate Program in 2007. His dissertation project focused on the accuracy of image guidance and gated radiotherapy using the Novalis Radiosurgery system. After completing his PhD Dr. Tenn left UCLA for a one year post doctoral fellowship at the Stanford University Department of Radiation Oncology. While at Stanford he worked with the CyberKnife radiosurgery team as well as with the Stanford Outreach physics program.  More