Lung Volume MeasurementsPlethysmography, Whole BodyLungBlood Volume DeterminationImaging, Three-DimensionalCell RespirationFunctional Residual CapacityReproducibility of ResultsBlood VolumeTotal Lung CapacityRespirationObserver VariationRespiratory MechanicsPulmonary EmphysemaLung ComplianceImage Processing, Computer-AssistedResidual VolumeLung DiseasesPneumonectomyMagnetic Resonance ImagingUltrasonography, PrenatalOrgan SizeTomography, X-Ray ComputedErythrocyte VolumeRespiratory Function TestsEnophthalmosPlasma VolumeSensitivity and SpecificityOxygen ConsumptionCardiac VolumeTidal VolumeVital CapacityOrbital FracturesLung NeoplasmsSerum Albumin, Radio-IodinatedImage Interpretation, Computer-AssistedForced Expiratory VolumeHeliumReference ValuesUltrasonographyLung InjuryRadiographic Image Interpretation, Computer-AssistedGestational AgeProspective StudiesStroke VolumeAirway ResistanceDiaphragmInhalationPulmonary Diffusing CapacityPulmonary Gas ExchangeRespiratory MusclesEmphysemaPressureTime FactorsExpiratory Reserve VolumeOxygenPregnancyPhantoms, Imaging