Jiajian (Jason) Shen is an Associate Professor and Proton Physicist in the Department of the Radiation Oncology at Mayo Clinic Arizona. He is board-certified in Medical Physics. He completed his Doctor of Philosophy at the Pennsylvania State University and Master of Science at the Beijing Normal University. His Clinical Interests are Proton Therapy, Radiation Dosimetry, Radiation Therapy, Radiation Therapy Physics, Radiation Oncology, Medical Radiation Physics, and Radiation Physics.