Blood VolumePlasma VolumeStroke VolumeLung Volume MeasurementsErythrocyte VolumeBlood Volume DeterminationMagnetic Resonance ImagingForced Expiratory VolumeImaging, Three-DimensionalOrgan SizeResidual VolumeImage Processing, Computer-AssistedReproducibility of ResultsCell SizeTime FactorsBrainTomography, X-Ray ComputedAtrophyRespiratory MechanicsPressureHemodynamicsPlasma SubstitutesImage Interpretation, Computer-AssistedCardiac OutputLungSensitivity and SpecificityRespiratory Function TestsProspective StudiesWater-Electrolyte BalanceReference ValuesHematocritIsotonic SolutionsTreatment OutcomeBlood PressureHypotonic SolutionsRespirationDogsFunctional Residual CapacityVital CapacityObserver VariationHypovolemiaOsmolar ConcentrationAlgorithmsVentricular Function, LeftFluid TherapyAnalysis of VarianceEchocardiography, Three-DimensionalClosing VolumeRadiotherapy Planning, Computer-AssistedLung ComplianceModels, BiologicalHeart VentriclesSpirometryTumor BurdenPredictive Value of TestsRespiration, ArtificialBody WaterImage EnhancementExpiratory Reserve VolumeRetrospective StudiesPlethysmographySodium ChlorideOsmosisCerebrovascular CirculationWaterDisease Models, AnimalLinear ModelsPulmonary VentilationPhantoms, ImagingRats, Sprague-DawleyExtracellular SpaceFluid ShiftsHeart RateOxygenAgingBlood Flow VelocitySodiumPulmonary EmphysemaFollow-Up StudiesRegression AnalysisSeverity of Illness IndexOsmotic PressureInhalationCarbon DioxideBody WeightHeartThoraxAirway ResistancePregnancyEquipment DesignKidneyHydroxyethyl Starch DerivativesRegional Blood FlowBrain IschemiaBody FluidsModels, AnatomicCerebral InfarctionVentricular Function, RightRadiotherapy DosageMagnetic Resonance Imaging, Cine