Radiotherapy, ConformalRadiotherapy DosageRadiotherapy, Intensity-ModulatedRadiotherapy Planning, Computer-AssistedRadiotherapyOrgans at RiskRadiation InjuriesDose FractionationRadiotherapy, Computer-AssistedCombined Modality TherapyDose-Response Relationship, RadiationRadiometryRadiotherapy, AdjuvantThoracic NeoplasmsChemoradiotherapyRadiation OncologyRadiation PneumonitisProstatic NeoplasmsRectumAndrogen AntagonistsImaging, Three-DimensionalTreatment OutcomeNasopharyngeal NeoplasmsRadiotherapy, High-EnergyNeoplasm StagingNeoadjuvant TherapyRadiation DosageProstate-Specific AntigenDisease-Free SurvivalHead and Neck NeoplasmsFollow-Up StudiesLung NeoplasmsRetrospective StudiesBrain NeoplasmsTomography, X-Ray ComputedRadiotherapy, Image-GuidedTumor BurdenAntineoplastic Combined Chemotherapy ProtocolsSurvival RateChemotherapy, AdjuvantCarcinoma, Non-Small-Cell LungPortal VeinPrognosisLiver NeoplasmsCarcinoma, HepatocellularRadiosurgeryBrachytherapyNeoplasm Recurrence, LocalProspective StudiesCarcinoma, Squamous CellRadiation Tolerance