Slide Presentations I. Radiation Countermeasures: Why Do We Need Them? II. Basic Physics of Ionizing Radiation III. Biological Effects of Ionizing Radiation IV. Protective Measures Against Ionizing Radiation Duke Radiation Safety Inservice Materials Cs-137 Irradiator Safety Review Radiation Safety for Physician Assistant Students Radiation Safety in the PET Facility: Radiation Safety in the PET Facility: Radiation Safety Techniques Course: Radiation Safety Considerations for PET/CT Radiation Safety Considerations for PET/CT