PerfusionLower ExtremityUpper ExtremityPerfusion ImagingExtremitiesMyocardial Perfusion ImagingLegChemotherapy, Cancer, Regional PerfusionTomography, Emission-Computed, Single-PhotonAmputationArmBones of Upper ExtremityCoronary CirculationLeg InjuriesRegional Blood FlowIschemiaCerebrovascular CirculationArm InjuriesContrast MediaBones of Lower ExtremitySarcomaTechnetium Tc 99m SestamibiTime FactorsSoft Tissue NeoplasmsOrganotechnetium CompoundsMagnetic Resonance AngiographyMagnetic Resonance ImagingTreatment OutcomeLeg BonesPeripheral Vascular DiseasesTomography, X-Ray ComputedBlood Flow VelocityLimb SalvageMicrocirculationVascular Surgical ProceduresLaser-Doppler FlowmetryRadiopharmaceuticalsVeinsVentilation-Perfusion RatioHeartRetrospective StudiesUpper Extremity Deep Vein ThrombosisReproducibility of ResultsSensitivity and SpecificityProspective StudiesThallium RadioisotopesArterial Occlusive DiseasesBlood VolumeExercise TestDipyridamoleParesisAngiographyHemodynamicsRecovery of FunctionFollow-Up StudiesToesImage Processing, Computer-AssistedGangrenePeripheral Arterial DiseaseVascular PatencyFemoral ArteryDogsOximesBlood PressureFemoral VeinImage EnhancementNitrogen RadioisotopesGadolinium DTPAMyocardial IschemiaHemiplegiaBrainAdenosineMuscle, SkeletalTechnetium Tc 99m ExametazimePulmonary CirculationPredictive Value of TestsVasodilator AgentsPulmonary EmbolismGated Blood-Pool ImagingMusculoskeletal DiseasesBiomechanical PhenomenaArteriesTechnetium Tc 99m Aggregated AlbuminOrgan PreservationMovementHand InjuriesPressureMyocardiumThighFoot InjuriesIntermittent ClaudicationTomography, Emission-ComputedFeasibility StudiesStrokeTibial ArteriesImage Interpretation, Computer-AssistedVascular System InjuriesVenous ThrombosisLeg UlcerHindlimb