Lung Volume MeasurementsLungTotal Lung CapacityFunctional Residual CapacityPulmonary EmphysemaRespiratory MechanicsLung ComplianceResidual VolumeLung DiseasesPneumonectomyRespiratory Function TestsPlethysmography, Whole BodyVital CapacityLung NeoplasmsTidal VolumeForced Expiratory VolumeHeliumLung InjuryBlood VolumeAirway ResistanceDiaphragmEmphysemaPulmonary Diffusing CapacityExpiratory Reserve VolumeInhalationRespirationPulmonary Gas ExchangeRespiratory MusclesHernia, DiaphragmaticLung TransplantationPulmonary AtelectasisForced Expiratory Flow RatesSpirometryPlethysmographyPressureCarcinoma, Non-Small-Cell LungPulmonary AlveoliInspiratory CapacityMaximal Expiratory Flow-Volume CurvesExhalationPositive-Pressure RespirationClosing VolumePulmonary VentilationAir PressureRespiratory Physiological PhenomenaAcute Lung InjuryThoraxTomography, X-Ray ComputedLung Diseases, ObstructiveImaging, Three-DimensionalRespiration, ArtificialThoracic WallDyspneaFetal Organ MaturityPulmonary CirculationAirway ObstructionPlasma VolumePulmonary Disease, Chronic ObstructivePulmonary FibrosisBronchoconstrictor AgentsRespiratory Distress Syndrome, AdultOrgan SizeBronchoscopyStroke VolumeBlood Gas AnalysisOxygenLung Diseases, InterstitialPhrenic NerveExtravascular Lung WaterMaximal Expiratory Flow RateReproducibility of ResultsRespiratory Dead SpaceMethacholine ChlorideMagnetic Resonance ImagingWork of BreathingSupine PositionPulmonary SurfactantsRespiratory InsufficiencyRadiography, ThoracicHigh-Frequency VentilationProne PositionDivingReference ValuesBronchoalveolar Lavage FluidPharynxThoracoscopyTreatment OutcomeCarbon DioxideDogsErythrocyte VolumeBronchoscopesFetal DiseasesProspective StudiesBronchiPositive-Pressure Respiration, IntrinsicPulmonary EdemaIntercostal MusclesSmokingAdministration, InhalationBlood Volume Determination