Dr. DeWeese received his medical degree with honors from the University of Colorado School of Medicine and served as chief resident and a post-doctoral laboratory research fellow at Johns Hopkins University School of Medicine before joining its faculty in 1995. He also holds professor appointments in the departments of urology and oncology, and a joint appointment in environmental health sciences at the Johns Hopkins Bloomberg School of Public Health.

Dr. Catherine Park (Science Council Vice-chair) is professor and Chair of the department of radiation oncology at the University of California San Francisco (UCSF), where her focus is breast cancer. Dr. Park has been instrumental in shaping the scientific content at major ASTRO meetings; she has served as Chair and Vice-chair of the Best of ASTRO meeting; as Chair and Vice-chair of the Annual Meeting Education Committee; and as a longstanding member of the Annual Meeting Steering Committee.


Dr. Park received her medical degree from the University of California Los Angeles School of Medicine and a Bachelor of Arts degree from the University of California Berkeley. She completed a residency in radiation oncology at Harvard Medical School's Joint Center for Radiation Therapy and an internship in internal medicine at Beth Israel Deaconess Hospital in Boston. She also is an attending physician at the UCSF Medical Center and previously was faculty biologist at the Lawrence Berkeley National Laboratory.

Dr. William Hartsell (Health Policy Council Vice-chair) is a radiation oncologist at the Ann and Robert H. Lurie Children's Hospital, medical director of the Northwestern Medicine Chicago Proton Center and a partner in Radiation Oncology Consultants, Ltd. in Chicago. For more than a decade, Dr. Hartsell has worked with ASTRO to help shape health policy, specifically in code development and utilization for medical billing. He is the current ASTRO advisor to the American Medical Association's CPT® (Current Procedural Terminology) panel, which is responsible for the development of new codes.

Dr. Hartsell earned his MD and his Bachelor of Science degree from the University of Oklahoma in Norman, Oklahoma. He completed a residency in radiation oncology at Rush University in Chicago, where he also held his first faculty appointment. Before joining Northwestern and the Chicago Cancer Hospital, he was an associate professor of radiation oncology at the University of Tennessee.

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