Radiation ProtectionRadiation MonitoringRadiation DosageCosmic RadiationRadiation InjuriesRadiographyRadiation-Protective AgentsDose-Response Relationship, RadiationHistoryRadiometryRadiation, IonizingAir Pollution, RadioactiveRadioactive FalloutHealth Planning OrganizationsRadiation, NonionizingEye Protective DevicesRadiologic HealthNeoplasms, Radiation-InducedTechnology, RadiologicRelative Biological EffectivenessRadiation ToleranceRadiationPhysical ProcessesOccupational ExposureRadioactive Hazard ReleaseProtective ClothingBody BurdenFluoroscopyGamma RaysRadiography, InterventionalRadiologyUltraviolet RaysRadiation OncologyElectromagnetic FieldsCanadaRadiation Injuries, ExperimentalRadiation PneumonitisSunscreening AgentsPhantoms, ImagingBackground RadiationRadiotherapyRadiation EffectsRadiotherapy DosageTime FactorsRadiation-Sensitizing AgentsCombined Modality TherapyEnvironmental ExposureX-RaysCobalt RadioisotopesAcute Radiation SyndromeTreatment OutcomeOxidative StressCell SurvivalSmokingLinear Energy Transfer