Lung Volume MeasurementsLungTotal Lung CapacityFunctional Residual CapacityPulmonary EmphysemaRespiratory MechanicsLung ComplianceResidual VolumeLung DiseasesPneumonectomyRespiratory Function TestsPlethysmography, Whole BodyVital CapacityLung NeoplasmsTidal VolumeForced Expiratory VolumeHeliumBlood VolumeLung InjuryAirway ResistanceRespirationDiaphragmPulmonary Diffusing CapacityInhalationEmphysemaExpiratory Reserve VolumePulmonary Gas ExchangeReproducibility of ResultsRespiratory MusclesPressureHernia, DiaphragmaticSpirometryLung TransplantationPlethysmographyForced Expiratory Flow RatesPulmonary AtelectasisImaging, Three-DimensionalExhalationPulmonary AlveoliInspiratory CapacityCarcinoma, Non-Small-Cell LungMaximal Expiratory Flow-Volume CurvesTomography, X-Ray ComputedPositive-Pressure RespirationPulmonary VentilationAir PressureClosing VolumeThoraxRespiratory Physiological PhenomenaLung Diseases, ObstructiveAcute Lung InjuryRespiration, ArtificialThoracic WallReference ValuesOxygenSensitivity and SpecificityTime FactorsDyspneaMagnetic Resonance ImagingOrgan SizePulmonary CirculationAirway ObstructionFetal Organ MaturityPulmonary Disease, Chronic ObstructiveStroke VolumeProspective StudiesPlasma VolumeBlood Gas AnalysisRespiratory Distress Syndrome, AdultBronchoconstrictor AgentsPulmonary FibrosisBronchoscopyExtravascular Lung WaterRespiratory Dead SpaceTreatment OutcomeLung Diseases, InterstitialMaximal Expiratory Flow RateCarbon DioxideMethacholine ChloridePhrenic NerveObserver VariationSupine PositionAnalysis of VarianceModels, BiologicalDogsWork of BreathingImage Processing, Computer-AssistedUltrasonography, PrenatalPulmonary SurfactantsRadiography, ThoracicRespiratory InsufficiencyProne PositionGestational AgeBlood Volume DeterminationAlgorithmsDivingBronchoalveolar Lavage FluidHigh-Frequency VentilationPharynxElasticity