Dean Hobbis, PhD

Dean Hobbis, PhD

Instructor of Radiation Oncology


  • BS, Physics: Eckerd College (2015)
  • MS, Physics: University of South Florida (2018)
  • PhD, Applied Physics: University of South Florida (2020)
  • Pg. Cert, Medical Physics: University of Chicago (2021)
  • Residency, Medical Physics: Mayo Clinic Arizona (2023)


Dean Hobbis, PhD, is an Instructor of Radiation Oncology at the Washington University School of Medicine. His area of expertise within radiation therapy includes auto-segmentation and 3D printing. His background in solid-state physics also leads to expertise in the applications of solid state devices in radiation therapy.

Dr. Hobbis’ research has focused on using deep-learning-based auto-segmentation models towards increased standardization, quality, and efficiency. Of particular interest are the applications for adaptive radiation therapy. Other research interests include unique approaches to respiratory motion management and cost-effective 3D-printed solutions. Dr. Hobbis is an active member of the American Association of Physicists in Medicine (AAPM), serving on both the Medical Physics Leadership Academy Community Subcommittee (MPLACO) and the Education and Training of Medical Physics (ETC). He also serves as a reviewer for several peer-reviewed journals.

Before joining the Division of Medical Physics in 2023 at Washington University, he completed residency training at Mayo Clinic Arizona. Dr. Hobbis earned his PhD in Applied Physics at the University of South Florida before completing the University of Chicago’s CAMPEP-accredited Medical Physics Certificate program in 2021. Originally from England, Dean moved to the United States in 2011 on a soccer scholarship and to pursue his undergraduate Physics degree at Eckerd College.


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