Radiation OncologyHealth PhysicsMedical OncologyRadiation InjuriesRadiotherapyCancer Care FacilitiesRadiobiologyRadiotherapy, Computer-AssistedRadiotherapy DosageBrachytherapyNeoplasmsRadiation DosageSocieties, MedicalRadiation, IonizingRadiotherapy Planning, Computer-AssistedDose-Response Relationship, RadiationRadiotherapy, ConformalOncology NursingRadiation ToleranceRadiotherapy, Image-GuidedRadiotherapy, High-EnergyDose FractionationRadiology Department, HospitalRadiotherapy, Intensity-ModulatedCombined Modality TherapyHospitals, UniversityRadiationQuality Assurance, Health CareRadiation ProtectionRadiation MonitoringRadiosurgeryRadiotherapy, AdjuvantOncology Service, HospitalChemoradiotherapyAccreditationHealth PlanningTreatment OutcomeRetrospective StudiesPositron-Emission TomographyNeoplasm StagingForecastingHead and Neck NeoplasmsUnited StatesBrain NeoplasmsQuestionnairesTomography, X-Ray ComputedBreast NeoplasmsNeoplasm Recurrence, LocalCosmic RadiationPrognosisRadiation Injuries, ExperimentalJapanSurvival RateFollow-Up StudiesRadiation PneumonitisPhysician's Practice PatternsProstatic NeoplasmsPilot ProjectsNeoplasms, Radiation-Induced