Medical Physics Faculty:
Nzhde Agazaryan, PhD, DABR, FAAPM
Professor of Radiation Oncology
Professor of Physics and Biology in Medicine
Chief of Clinical Medical Physics and Dosimetry
Dr. Agazaryan is a Professor of Radiation Oncology, Professor of the Physics and Biology in Medicine, and the Chief of Clinical Medical Physics at the UCLA School of Medicine. His appointment in the Department of Radiation Oncology involves research, teaching and clinical practice. Dr. Agazaryan is a Quality Officer of the UCLA Health's Faculty Practice Group (FPG) and the UCLA Department of Radiation Oncology. Dr. Agazaryan has been elected a Fellow of the American Association of Physicists (FAAPM). The FAAPM election honors members who have distinguished themselves by their contributions in research, education and leadership.
Dr. Agazaryan is currently the lead professor of the UCLA Physics of Radiation Therapy Graduate Course (PB MED 203) and the Applications of Medical Physics to Clinical Problems: Radiation Therapy Clinical Rotation (PB MED 202C). Dr. Agazaryan is also engaged in mentoring medical physics graduate students, residents and junior faculty. Dr. Agazaryan's research and clinical interests include stereotactic radiosurgery (SRS), stereotactic body radiotherapy (SBRT), with an emphasis on clinical implementation of translational research, clinical trials, small field dosimetry and image-guided radiotherapy (IGRT). He is an investigator of five clinical trials involving the use of Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiotherapy (SBRT). Dr. Agazaryan has made numerous international and national presentations, published over 40 peer-reviewed papers, over 120 abstracts, book editorial, booklet and several book chapters. Dr. Agazaryan is a Diplomate of The American Board of Radiology (DABR) - board certified in Therapeutic Radiologic Physics. He is also California State licensed to conduct therapy machine calibrations and radiation protection surveys.
Minsong Cao, PhD, DABR
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.
Phillip Chow, M.S., DABR
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. He stayed with Kaiser from 1998 to 2000 when he was accepted to the Biomedical Physics Graduate Program here at UCLA, starting in September of that year. He earned his Master of Science degree in Biomedical Physics in 2004 and shortly thereafter began working as a Medical Physicist here in the UCLA Department of Radiation Oncology. He is currently working on his PhD in Biomedical Physics while working full-time as a Medical Physicist at UCLA.
James Lamb, PhD
Assistant Professor in Residence
Dr. Lamb is an Assistant Professor in Residence in the UCLA Department of Radiation Oncology. He received his PhD in experimental high-energy particle physics from the University of California at Santa Barbara in 2009. After completing his PhD, Dr. Lamb was a post-doctoral researcher in the Department of Radiation Oncology at Washington University in Saint Louis. His research interests include respiratory-correlated imaging (4D-PET/4D-CT), lung cancer functional imaging, Monte Carlo simulation, and data mining. His clinical interests include episcleral plaque radiotherapy for ocular melanoma, automation of patient-specific quality-control, and the use of cutting-edge software technologies in radiation oncology.
Chul Lee, M.S., DABR
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.
John Lewis, PhD, DABR
Dr. Lewis earned his PhD in Physics in 2010 from UC San Diego, where his research focused on motion management and cone-beam CT imaging. After graduate school he joined the faculty at Brigham and Women's Hospital and Harvard Medical School where he worked for five years until joining UCLA in 2015. Dr. Lewis is board certified by the American Board of Radiology in Medical Physics. His research interests include respiratory motion modeling, delivered radiation dose verification, and MRI-guided radiotherapy.
Daniel Low, PhD, DABMP
Professor and Vice Chair of Physics
Dr. Low earned his PhD in Physics in 1988 from Indiana University and was a postdoctoral fellow for two years in radiation therapy physics at M.D. Anderson Cancer Center. He moved to Washington University where he eventually became a Professor and Director of Medical Physics. Dr. Low moved to UCLA in 2010 as the Vice Chair and Director of Medical Physics. Dr. Low is board certified by the American Board of Medical Physics in Therapeutic Medical Physics and by the American Board of Radiology and is a fellow of the American Association of Physicists in Medicine. His research interests include modeling of human breathing motion, radiation therapy safety, quality assurance methods, image-guided radiation therapy including magnetic resonance-image guided radiation therapy.
Sang-June Park, PhD, DABR
Dr. Park is an Assistant Clinical Professor and currently leading physicist of the Division of Brachytherapy in the UCLA Department of Radiation Oncology. He received his PhD from the Nuclear Engineering and Radiological Sciences, University of Michigan in 2005. After his PhD, Dr. Park joined Brookhaven National Laboratory for small animal imaging research (2005-2006). He received medical physics training from Harvard Medical School Department of Radiation Oncology at Brigham and Women’s Hospital and Dana-Farber Cancer Institute (2006-2009). His research interests include Brachytherapy, Monte Carlo simulations, EPID-based implanted marker tracking, respiratory gated imaging (4D-PET/4D-CT), and small animal imaging.
Sharon Qi, PhD, DABR
Dr. Qi received her PhD in Experimental Particle Physics from the Institute of High Energy Physics, Chinese Academy of Sciences in China. After her PhD, Dr. Qi worked at the Fermi National Accelerator Laboratory (Fermilab) as an Associate Scientist (2000-2004). Dr. Qi received her medical physics training at the Medical College of Wisconsin (2004-2006). Prior to joining UCLA, she worked at Medical College of Wisconsin and University of Colorado Denver as an Assistant Professor. She is certified by the American Board of Radiology in therapeutic radiologic physics. Dr. Qi's research interests include biological/functional imaging guided radiation therapy and adaptive radiation therapy, respiration and motion management, clinical outcome assessment and biological modeling.
Dan Ruan, PhD
Dr. Ruan has a wide interest in medical imaging, system modeling, optimization, informatics, and machine learning. With a Ph.D in Electrical Engineering and M.S. in Mathematics, Dr. Ruan is particularly interested in understanding the mathematics and physics in diagnostic radiology and radiation oncology. She has extensive knowledge and experience with the modeling, characterization, and solving the inverse problems for various medical imaging systems. Her research also covers longitudinal analysis and hybrid control based on heterogeneous data. As director of informatics, Dr. Ruan is in charge of the design and management of clinical and research registry, system integration and interface, and big data analytics and business intelligence solutions. Dr. Ruan is on the Board of Associate Editors for the Medical Physics Journal and a member of the Medical Physic Dataset Article Subcommittee. She is also affiliated with Bioengineering Department and the CAMPEP-accredited Physics and Biology in Medicine Interdisciplinary Graduate Program.
Anand Santhanam, PhD
Dr. Santhanam’s focus is on developing algorithms and techniques that cater to the requirements of medicine. In particular, he worked on the biomechanical modeling of lungs since 2002 for different applications ranging from computer animation, virtual reality, rehabilitation, tissue engineering to radiation oncology. His PhD dissertation was focused on developing High Performance Computing based algorithms for physics and physiology based 3D lung dynamics using state-of-art Graphics Processing Units (GPU) under the co-direction of Professor Jannick Rolland (currently at the University of Rochester, NY) and Dr. Sumanta Pattanaik (currently at the University of Central Florida) from August 2002 to May 2006. He also received the Link Foundation Fellowship award for his research during the year 2005. Dr. Santhanam was the University of Central Florida’s principal investigator of Florida James and Esther King 2008-10 Team Science Project grant for $1 Million in collaboration with the M.D. Anderson Cancer Center Orlando, which focuses on incorporating 3D biomechanical lung dynamic models for assessing the treatment efficacy of lung radiotherapy. Dr. Santhanam’s current research focus is on developing single GPU and multi-GPU accelerated algorithms for 3D/4D image processing, model based lung registration, anatomy deformation modeling, deformation based elasticity estimation, tumor dosimetry and lung deformation based radiotherapy evaluation. He has published several journal publications in the field of biomechanical organ modeling.
Ke Sheng, PhD, DABRProfessor
Dr. Sheng has a B.S. degree in mechanical engineering and an M.S. degree in astrophysics from the University of Science and Technology of China. In 2004, Dr. Sheng received his PhD from the University of Wisconsin-Madison in medical physics. He is certified by the American Board of Radiology in radiation therapy physics. He was appointed as Assistant Professor and then Associate Professor at the University of Virginia prior to joining UCLA. He was promoted to Professor-In-residence in 2015. His main research areas include inverse optimization, 4π non-coplanar radiotherapy, MRI guided radiotherapy, biological outcome modeling and nanotechnology applications in radiation therapy. He has published extensively in these areas. Supported by federal, institutional and industrial grants, he manages an active research team consisting of undergraduate, graduate students and postdoctoral fellows. More »
Steve Tenn, PhD, DABR
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. Dr. Tenn's research interests include investigating image guided methods for accurate stereotactic radiosurgery/radiotherapy and stereotactic body radiotherapy treatments.
Yingli Yang, PhD, DABR
Dr. Yang received her B.S., M.S. in Biomedical Engineering from Tsinghua University, China and her PhD in Biomedical Engineering (more specifically fast magnetic resonance spectroscopy imaging) from Columbia University. She finished her post-doctoral research training and medical physics clinical residency at Memorial Sloan-Kettering Cancer Center before joining UCLA Radiation Oncology faculty in 2011. Dr. Yang's research interests include volumetric modulated arc therapy, advanced MR imaging techniques and its applications in radiation therapy (RT): functional MRI in MRgRT, cardiac toxicity study for MRgRT, MR only simulation for RT.
Youming Yang, PhD
Dr. Yang is an Assistant Professor in the UCLA Department of Radiation Oncology. He received his B.S. in Engineering Physics from the University of California - Berkeley, and M.S. in Physics and PhD in Medical Physics from the University of Wisconsin - Madison. Prior to joining UCLA, he was a postdoctoral researcher at the Stanford Department of Radiation Oncology. His basic research interests include non-convex and large search-space inverse optimization problems encountered in dynamic radiation delivery trajectories, as well as applying Monte Carlo methods to studying the microdosimetry and radiation biology of novel particle, and ultrahigh-dose rate radiation therapy modalities. His clinical research interests include the applying the latest technologies and processes to improving efficiency and patient-safety in the clinic.
Medical Physics Residents:
Victoria Yu, PhD
Medical Physics Resident - 2nd year
Dr. Yu started her therapeutic Medical Physics residency at UCLA in summer 2017, after receiving her Ph.D in Biomedical Physics at UCLA. She previously received a B.S. degree in Physics and Statistics from Rutgers University. Victoria's research interests focus on biological modeling and radiotherapy fractionation schedule optimization, treatment planning optimization, and image texture analysis for advancing recurrence detection.
Dylan O'Connell, PhD
Medical Physics Resident - 1st year
Dr. O'Connell received his B.S. in Physics from Tufts University in 2013, and his Ph.D in Biomedical Physics from UCLA in 2018. His research interests include improving 4DCT reconstruction using a respiratory motion model, improving processing times of data-parallel tasks such as model parameter fitting and image generation using GPUs, and in-house clinical software safety.
Meet the Dosimetry Group »