Proton TherapyProtonsRadiotherapy Planning, Computer-AssistedRadiotherapy DosageRadiotherapy, Intensity-ModulatedOrgans at RiskRadiometryCraniospinal IrradiationNeutronsChordomaMonte Carlo MethodPhotonsRadiotherapy, ConformalRadiotherapy, High-EnergyProton PumpsRelative Biological EffectivenessRadiation InjuriesFour-Dimensional Computed TomographyRadiation DosageUncertaintyScattering, RadiationPhantoms, ImagingRadiation OncologyFibromatosis, AbdominalRadiotherapyRadiotherapy, Computer-AssistedDose-Response Relationship, RadiationProton Pump InhibitorsTomography, X-Ray ComputedProstatic NeoplasmsTumor BurdenAlgorithmsCone-Beam Computed TomographyEquipment DesignNeoplasms, Radiation-InducedMagnetic Resonance SpectroscopyMovementReproducibility of ResultsHydrogen-Ion ConcentrationSpineCarbonComputer SimulationParticle Accelerators