He is Fellow of the following: American College of Physicians (FACP) and of Radiology (FACR), and American Society of Radiation Oncology (FASTRO) and of Clinical Oncology (FASCO). His major honors include: Gold Medal, ASTRO (2005), Service to America Homeland Security Medal (2011), Radiation Research Society Failla Award (2016), University of Vermont, Doctor of Science Honoris Causia (2015), National Coalition for Cancer Survivorship Ellen Lewis Stovall Patient Centered Cancer Care Award (2018), National Council of Radiation Protection and Measurement Warren Sinclair Medal (2019), and D.A. Henderson Lifetime Achievement Award (2023).

His interests include the integration of the broad expertise involved in the radiation sciences, radiation-inducible molecular targets (radiation “as a drug”) by defining radiation dose in biological terms as well as Gy, radiation biomarkers of normal tissue injury and multi-modality cancer therapy.