Reference StandardsSensitivity and SpecificityHeptachlor EpoxideReproducibility of ResultsAldrinPhosphorous AcidsMineral FibersReference ValuesQuality ControlCalibrationSpectrophotometry, AtomicParaffin EmbeddingFormaldehydeIndicator Dilution TechniquesObserver VariationGas Chromatography-Mass SpectrometryFixativesDiagnostic Techniques and ProceduresEvaluation Studies as TopicPredictive Value of TestsMass SpectrometryTomography, X-Ray ComputedROC CurveDiagnostic Tests, RoutineIndicators and ReagentsAlgorithmsProspective StudiesContrast MediaRadiographic Image Interpretation, Computer-AssistedReagent Kits, DiagnosticMicrobial Sensitivity TestsMagnetic Resonance ImagingClinical Laboratory TechniquesImaging, Three-DimensionalRadiologyAngiography, Digital SubtractionImage Interpretation, Computer-AssistedRadiographic Image EnhancementBignoniaceaePolymerase Chain ReactionImage Processing, Computer-AssistedMagnetic Resonance AngiographyClinical CodingCineradiographyImage EnhancementRetrospective StudiesNatural Language ProcessingReagent StripsMolecular Diagnostic TechniquesMicroscopyPhotographyAutomationPhysical ExaminationDiagnostic ErrorsMultidetector Computed TomographyTime FactorsPoint-of-Care SystemsOphthalmoscopyImmunoassayMass ScreeningUltrasonographyFalse Positive ReactionsFeasibility StudiesPositron-Emission TomographyColonography, Computed TomographicNucleic Acid Amplification TechniquesX-Ray Intensifying ScreensChromatography, High Pressure LiquidMEDLINESputumBacteriological TechniquesRadiography, ThoracicInformation Storage and RetrievalDatabases, FactualEnzyme-Linked Immunosorbent AssayFractional Flow Reserve, MyocardialSingle-Blind MethodArea Under CurvePattern Recognition, AutomatedCross-Sectional StudiesSeverity of Illness IndexGadolinium DTPASoftwareParasitologyPhantoms, ImagingUrinalysisCardiac-Gated Imaging TechniquesResearch DesignRadiopharmaceuticalsInfant, NewbornSolitary Pulmonary NoduleVasospasm, IntracranialOphthalmologyTreatment OutcomeParaffinStatistics, NonparametricFrozen SectionsMagnetic Resonance Imaging, CineBiopsyUnited States