Faculty and Staff
The Department of Radiation Medicine is made up of Faculty Radiation Oncologists and Medical Physicists, as well as several Clinical Associates at our satellite locations across the state, Get to know more about our team below.
Department Chair
Howard M. Sandler, M.D., M.S., FASTRO, FASCO, is chair for the Department of Radiation Medicine, effective Jan. 1, 2026. Coincident with this appointment, Sandler will assume the role of associate director for radiation medicine in the Knight Cancer Institute.
Dr. Sandler received his medical degree from the University of Connecticut and completed his residency and training at the University of Pennsylvania. His specialty area is radiotherapy and chemotherapy for prostate cancer. He recently led an NIH-funded clinical trial to investigate novel radiation targeting strategies for prostate cancer. Sandler’s studies also include evaluating the quality of life of prostate cancer patients following surgery and radiation therapy.
Vice Chair
John Bayouth, Ph.D. is the Vice Chair and Chief Medical Physicist for the Department of Radiation Medicine.
Dr. Bayouth earned bachelor's and master's degree from the Kansas State University. He holds a doctoral degree in radiation physics from MD Anderson and completed a research fellowship in radiation physics with MD Anderson. His research interests have been in Radiation-induced changes in pulmonary function and MRI/Image Guided Radiation Therapy.
Administrator
Kevin Keen is the Department Administrator of the Department of Radiation Medicine. Kevin graduated from the University of Arkansas at Fayetteville with a Bachelor’s of Science in Business Administration. He attended the University of Arkansas for Medical Sciences’ (UAMS) College of Public Health and graduated with a Masters in Health Administration while interning under the campus CFO. He then completed an administrative fellowship at the UAMS Medical Center during which he was fortunate to work on several projects with the leadership of the Rockefeller Cancer Institute. Kevin accepted a position with the Rockefeller Cancer Institute following his fellowship, and for five years worked alongside many incredible leaders, striving to improve access and outcomes for cancer patients in Arkansas. During this time, he was proud to support their Radiation Oncology Center as they achieved ASTRO’s APEx accreditation, opened satellite treatment facilities in underserved areas, and began construction of Arkansas’ first proton therapy center.