Particle SizeReproducibility of ResultsObserver VariationMagnetic Resonance ImagingTime FactorsSensitivity and SpecificityReference ValuesCalibrationEquipment DesignProspective StudiesAlgorithmsImage Processing, Computer-AssistedImaging, Three-DimensionalLuminescent MeasurementsModels, BiologicalKineticsPredictive Value of TestsAnthropometryBlood Flow VelocityBlood Pressure DeterminationAnalysis of VarianceBiological MarkersPhantoms, 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 MeasurementScattering, RadiationUltrasonography, PrenatalTransducers, PressureWeights and Measures