DiffusionTomography, X-Ray ComputedTomographyDiffusion Magnetic Resonance ImagingPositron-Emission TomographyTomography, Optical CoherenceDiffusion Tensor ImagingTomography, Emission-ComputedTomography, Spiral ComputedTomography, OpticalMultidetector Computed TomographyTomography, Emission-Computed, Single-PhotonElectron Microscope TomographyCone-Beam Computed TomographyFacilitated DiffusionAnisotropyTomography, X-RayImage Processing, Computer-AssistedImaging, Three-DimensionalFluorodeoxyglucose F18Tomography Scanners, X-Ray ComputedMagnetic Resonance ImagingSensitivity and SpecificityReproducibility of ResultsBrainImage EnhancementAlgorithmsNerve Fibers, MyelinatedPhantoms, ImagingModels, BiologicalDiffusion of InnovationFluorescence Recovery After PhotobleachingMultimodal ImagingTime FactorsX-Ray MicrotomographyPredictive Value of TestsContrast MediaFluorine RadioisotopesComputer SimulationDisk Diffusion Antimicrobial TestsRadiographic Image Interpretation, Computer-AssistedDiagnostic ImagingImage Interpretation, Computer-AssistedCorpus CallosumRetrospective StudiesArtifactsModels, TheoreticalFour-Dimensional Computed TomographyProspective StudiesDiffusion Chambers, CultureWaterNerve FibersMathematicsTreatment OutcomeRadiographic Image EnhancementCarbon RadioisotopesCerebrovascular CirculationRadiography, AbdominalKineticsBrain MappingCalcinosisRadiography, ThoracicBiological TransportMacula LuteaEquipment DesignBiophysicsObserver VariationPhotobleachingCoronary AngiographyMicrobial Sensitivity TestsOxygen RadioisotopesDiagnostic Techniques, OphthalmologicalFollow-Up StudiesCell MembraneAnatomy, Cross-SectionalFluorescent DyesMagnetic Resonance SpectroscopyViscosityPulmonary Diffusing CapacityBiophysical PhenomenaInternal CapsuleMonte Carlo MethodHeliumCoronary Artery DiseaseFeasibility StudiesPermeabilityModels, ChemicalRadiation DosageBronchographyAnti-Bacterial AgentsModels, AnatomicSubtraction TechniqueOptical PhenomenaSpectrometry, FluorescenceOptic DiskBrain NeoplasmsBrain DiseasesMembrane FluidityNeural PathwaysEquipment Failure Analysis