Factor Analysis, StatisticalPsychometricsModels, PsychologicalReproducibility of ResultsQuestionnairesModels, StatisticalQuality of LifeSensitivity and SpecificityTime FactorsObserver VariationReference ValuesCalibrationEquipment DesignProspective StudiesAlgorithmsImage Processing, Computer-AssistedImaging, Three-DimensionalLuminescent MeasurementsModels, BiologicalKineticsPredictive Value of TestsAnthropometryBlood Flow VelocityBlood Pressure DeterminationAnalysis of VarianceBiological MarkersPhantoms, ImagingMagnetic Resonance ImagingMethodsLung Volume MeasurementsBlood PressureEquipment Failure AnalysisOxygenLinear ModelsReference StandardsRegression AnalysisComputer SimulationImage Interpretation, Computer-AssistedPressureHydrogen-Ion ConcentrationSpectrometry, FluorescenceMagnetic Resonance SpectroscopyWaterPregnancyMonitoring, PhysiologicDimensional Measurement AccuracyBiomechanical PhenomenaFluorescent DyesTemperatureMathematicsTransducersUltrasonographyElectric ImpedanceModels, TheoreticalCross-Sectional StudiesEnvironmental MonitoringPain Measurement