Richard Castillo, PhD, DABR

Associate Professor

Department of Radiation Oncology


(404) 778-3473


Winship Cancer Institute of Emory University



Richard Castillo, PhD, DABR, is an Associate Professor of Medical Physics in the Department of Radiation Oncology. An ABR board certified medical physicist, Dr. Castillo has expertise in image-guided, and adaptive radiation therapy, the use of deformable image registration in medical image analysis, and quantitative methods for lung function imaging from CT. He joined Emory in 2018.

Dr. Castillo is an active member of the American Association of Physicists in Medicine (AAPM), and currently sits on the AAPM's Diversity and Inclusion subcommittee. He also actively serves as Associate Senior Editor for the International Journal of Radiation Oncology, Biology, Physics.


Dr. Castillo received his MS and PhD in Medical Physics from the University of Texas Graduate School of Biomedical Sciences in Houston, TX, and completed a postdoctoral fellowship in Radiation Oncology at the University of Texas MD Anderson Cancer Center. He received his certification from the American Board of Radiology in Therapeutic Medical Physics in 2016.


Dr. Castillo's research is largely focused on the use of deformable image registration in medical image analysis, for purposes of guiding personalized delivery and treatment adaptation in radiotherapy of thoracic malignancies. Dr. Castillo previously has served as principal investigator for an NIH Research Scientist Development Award (K01), and currently is co-investigator on an ongoing clinical trial (NCT02528942) prospectively evaluating the safety, feasibility, and preliminary efficacy of 4DCT-ventilation functional avoidance planning. As part of his PhD research, Dr. Castillo founded The Deformable Image Registration Laboratory website in 2009, and continues to maintain and support its function as a public repository for reference image data and image analysis software for quantitative clinical evaluation of deformable image registration.