Reproducibility of ResultsSensitivity and SpecificityGas Chromatography-Mass SpectrometryReagent Kits, DiagnosticEvaluation Studies as TopicReference StandardsAlgorithmsImage Processing, Computer-AssistedPolymerase Chain ReactionTime FactorsChromatography, High Pressure LiquidObserver VariationImaging, Three-DimensionalQuality ControlLaboratoriesReference ValuesImage Interpretation, Computer-AssistedDiagnostic Techniques, OphthalmologicalCalibrationAutomationMagnetic Resonance ImagingTomography, Optical CoherenceImage EnhancementPhotographyTranslationsAnalysis of VarianceEquipment DesignPredictive Value of TestsRadiographic Image Interpretation, Computer-AssistedBlood Flow VelocityRespiratory-Gated Imaging TechniquesFeasibility StudiesPhantoms, ImagingAnatomic LandmarksSoftwareDiet RecordsOligonucleotide Array Sequence AnalysisQuestionnairesSpecimen HandlingProspective StudiesElectrophoresis, CapillaryAutomation, LaboratoryDiet SurveysMethodsTomography, X-Ray ComputedGene Expression ProfilingContrast MediaNerve FibersPathology, ClinicalLanguageClinical Laboratory TechniquesGlaucomaBrainOptic DiskLimit of DetectionPhotogrammetryChromatography, LiquidAutoanalysisTomographyRadiopharmaceuticalsCapillary ElectrochromatographyCorneal PachymetryMass SpectrometryCephalometryKnee JointLaboratory Proficiency TestingPositron-Emission TomographyData Interpretation, StatisticalLinear Models