MicrospheresPolyglycolic AcidParticle SizeDrug CarriersDelayed-Action PreparationsDrug CompoundingPolymersLactic AcidChitosanHolmiumMicroscopy, Electron, ScanningChemistry, PharmaceuticalDrug Delivery SystemsSpheroids, CellularPolystyrenesGelatinHexuronic AcidsYttrium RadioisotopesGlucuronic AcidTechnology, PharmaceuticalBiocompatible MaterialsAlginatesPolyvinyl AlcoholLatexCapsulesRegional Blood FlowNanospheresSurface PropertiesPolymethacrylic AcidsDogsScandiumPorosityCoronary CirculationExcipientsRadioisotopesSuspensionsCerium RadioisotopesTechnetium Tc 99m Aggregated AlbuminEmulsionsAcrylic ResinsSolubilityAbsorbable ImplantsPolyglactin 910Strontium RadioisotopesViscosityIridoid GlycosidesSerum Albumin, BovineNeoplastic Stem CellsDiffusionPolyestersPhantoms, ImagingRabbitsMagneticsArteriovenous AnastomosisGlassHydrogelTime FactorsBiodegradation, EnvironmentalHepatic ArteryAcrylatesSpectroscopy, Fourier Transform InfraredDurapatiteHemodynamicsWaterSilicon DioxideEmbolization, TherapeuticTin RadioisotopesInjectionsDextransScattering, RadiationFluorescent DyesTablets, Enteric-CoatedPolyethylene GlycolsPulmonary CirculationHydrogelsCollateral CirculationRheologyMethylcelluloseOilsSwineInjections, Intra-ArterialPancreatinStaphylococcal Toxoid