Radiotherapy Setup ErrorsRadiosurgeryRadiotherapy Planning, Computer-AssistedRadiotherapy DosageSpiral Cone-Beam Computed TomographyRadiotherapy, Image-GuidedDose FractionationRadiotherapy, ConformalCone-Beam Computed TomographyRadiotherapyLung NeoplasmsRadiation InjuriesRadiometryTreatment OutcomeRadiotherapy, Intensity-ModulatedFiducial MarkersCarcinoma, Non-Small-Cell LungPatient PositioningDose-Response Relationship, RadiationLiver NeoplasmsRadiotherapy, AdjuvantRadiotherapy, Computer-AssistedNeoplasm Recurrence, LocalTomography, X-Ray ComputedRetrospective StudiesNeoplasm StagingCombined Modality TherapyRadiotherapy, High-EnergyFollow-Up StudiesOrgans at RiskAnatomic LandmarksRadiobiologyImmobilizationFour-Dimensional Computed TomographySpinal NeoplasmsRadiation DosageProstatic NeoplasmsX-Ray Intensifying ScreensBrachytherapyOrgan Sparing Treatments