Noninvasive VentilationDiagnostic ImagingMagnetic Resonance ImagingCombined Modality TherapySensitivity and SpecificityReproducibility of ResultsTomography, X-Ray ComputedRespiratory InsufficiencyPositron-Emission TomographyPositive-Pressure RespirationContrast MediaMolecular ImagingPredictive Value of TestsUltrasonographyRadiopharmaceuticalsTreatment OutcomeTime FactorsImage Processing, Computer-AssistedImaging, Three-DimensionalMonitoring, PhysiologicSpectroscopy, Near-InfraredFeasibility StudiesImage Interpretation, Computer-AssistedMagnetic Resonance AngiographyProspective StudiesEquipment DesignBlood Flow VelocityRetrospective StudiesImage EnhancementTomography, Emission-Computed, Single-PhotonTomography, Emission-ComputedElasticity Imaging TechniquesRespiration, ArtificialMasksAlgorithmsUltrasonic TherapyBrainUltrasonicsFluorine RadioisotopesFluorodeoxyglucose F18Disease Models, AnimalPrognosisBiological MarkersBreath TestsFollow-Up StudiesTechnetiumLuminescent MeasurementsOximetryOxygenEchocardiographyWhole Body ImagingPhotoacoustic TechniquesROC CurvePrenatal DiagnosisEchocardiography, DopplerSeverity of Illness IndexPhantoms, ImagingMagnetic Resonance SpectroscopyOptical ImagingSignal Processing, Computer-AssistedCoronary AngiographyMaternal Serum Screening TestsElectrocardiographyCardiography, ImpedanceBiopsyIntubation, IntratrachealBlood Pressure DeterminationObserver VariationThermographyNeuromuscular DiseasesPlethysmographyTransducersUltrasonography, DopplerPlethysmography, ImpedanceNeoplasmsTomography, OpticalTomographyVentilators, MechanicalModels, CardiovascularCerebrovascular CirculationAngiographyReference ValuesMicrobubblesHigh-Intensity Focused Ultrasound AblationMice, NudeAcute DiseaseBody Surface Potential MappingBlood PressureCoronary Artery DiseaseInfrared RaysCell Line, TumorIntermittent Positive-Pressure VentilationAcoustic StimulationTomography, Spiral ComputedCoronary CirculationAuditory PerceptionExhalationRadionuclide ImagingVentilator WeaningHemodynamics