Radiotherapy, Intensity-ModulatedRadiotherapy Planning, Computer-AssistedTomography, Spiral ComputedParticle AcceleratorsOrgans at RiskRadiotherapy DosageRadiometryRadiotherapy, ConformalRadiotherapy, Image-GuidedRadiotherapy, Computer-AssistedDose FractionationRadiation InjuriesOrgan Sparing TreatmentsLymphatic IrradiationRadiation DosagePhantoms, ImagingPatient PositioningRadiosurgeryRadiotherapy, High-EnergyDose-Response Relationship, RadiationRetreatmentCranial IrradiationProne PositionHead and Neck NeoplasmsSpinal NeoplasmsFeasibility StudiesCalibrationLung NeoplasmsTreatment OutcomeTomography, X-Ray ComputedEsophagusBrain NeoplasmsAlgorithmsMovementCombined Modality TherapyRectal NeoplasmsProstatic NeoplasmsEquipment DesignNeoplasm StagingCarcinoma, HepatocellularCarcinoma, Non-Small-Cell LungLungLiver NeoplasmsNeoplasmsRetrospective Studies