School of Medicine

Radiation Oncology Medical Physics


The program directors are responsible for ensuring the residency program satisfies CAMPEP standards, for coordinating faculty, recruiting residents into the program, advising residents, and evaluating and promoting the program.

The program directors are also responsible for determining and documenting that each student offered entry into the residency program satisfies the CAMPEP admission standards for residency education in medical physics or completes rigorous remedial education to meet the standards.

The program directors ensure that all resident statistics, annual reports, and other information that is required by CAMPEP are reported accurately and in a timely fashion.


Hui Zhao, PhD, DABR

Hui Zhao, PhD, is an Associate Professor in the Department of Radiation Oncology at the University of Utah and a medical physicist at Huntsman Cancer Hospital (HCH). Dr. Zhao specializes in the physics of intensity modulated radiation therapy (IMRT), image-guided radiation therapy (IGRT), stereotactic body radiation therapy (SBRT), stereotacti... Read More

Research Interests: Adaptive Radiation Therapy, CT-on-Rails, Calypso, Gated Delivery, Image Guided Radiation Therapy (IGRT), Intra- and Inter-fractional Tumor Motion, Radiosurgery, Radiotherapy, Stereotactic Body Radiation Therapy (SBRT), Stereotactic Radiosurgery (SRS), Surface Imaging (VisionRT and HumediQ), Ultrasound (Clarity and BAT), kV and MV Cone-Beam CT

Residency: Washington University in St. Louis


Phone: 801-587-4054


Adam B. Paxton, PhD

Adam Paxton, PhD is an Assistant Professor in the Department of Radiation Oncology at the University of Utah and a Medical Physicist at Huntsman Cancer Hospital (HCH). Dr. Paxton received his BS from the College of Idaho and his MS and PhD from the University of Wisconsin. He completed his residency training in Medical Phys... Read More

Research Interests: Brachytherapy, Motion Management in Radiation Therapy, Patient Safety, Protons, Radiosurgery

Residency: University of California, San Diego



Geoff Nelson, PhD, DABR

Geoff Nelson, MS, PhD, is an Assitant Professor in the Department of Radiation Oncology at the University of Utah. He specializes in imaging in radiation oncology and in brachytherapy. He received his BS in Biomedical Physics from California State University Fresno and his Masters and Doctorate in Bioengineering from Stanford University. He complet... Read More

Residency: University of Wisconsin–Madison


Phone: 801-213-4260