Human BodyMamillary BodiesStroke VolumeStrokeBody Fat DistributionPlethysmographyReproducibility of ResultsBlood Volume DeterminationBlood VolumeBody CompositionLung Volume MeasurementsImaging, Three-DimensionalObserver VariationCardiac OutputMagnetic Resonance ImagingImage Processing, Computer-AssistedPlasma VolumeCardiac VolumeHemodynamicsErythrocyte VolumeOrgan SizeUltrasonography, PrenatalEnophthalmosTomography, X-Ray ComputedSensitivity and SpecificityTime FactorsProspective StudiesImage Interpretation, Computer-AssistedPediculusEchocardiography, Three-DimensionalBlood PressureOrbital FracturesSerum Albumin, Radio-IodinatedUltrasonographyVentricular Function, LeftReference ValuesBrain IschemiaHeart RateModels, AnatomicBlood Flow VelocityBrainAlgorithmsHeart VentriclesPredictive Value of TestsFluid TherapyRadiographic Image Interpretation, Computer-AssistedCerebrovascular DisordersAnalysis of VarianceThermodilutionPhantoms, ImagingPlethysmography, Whole BodyGestational AgeTransducersEquipment DesignCardiography, ImpedancePregnancyTreatment OutcomeFollow-Up StudiesAnatomy, Cross-SectionalRetrospective StudiesCrown-Rump LengthPostureFunctional Residual CapacityVascular ResistanceAtrophyEchocardiographyHeartHypovolemiaAnthropometryModels, BiologicalOrbitLungModels, CardiovascularRegression AnalysisIndocyanine GreenVentricular Function, RightImage EnhancementContrast MediaCerebrovascular CirculationRisk FactorsPregnancy Trimester, ThirdRadiographic Image EnhancementCell SizeCardiac CatheterizationLinear ModelsOxygen ConsumptionLymphedemaMyocardial ContractionCardiovascular Physiological PhenomenaDogsMonitoring, PhysiologicDisease Models, AnimalCerebral InfarctionFeasibility StudiesEchocardiography, DopplerAnatomyUltrasonography, DopplerBody FluidsCerebral HemorrhageCentral Venous Pressure