简介：BackgroundTwo-dimensionalspeckletrackingimaging(2D-STI)andreal-timethree-dimensionalechocardiography(RT-3DE)havemoreadvantagesinevaluatingleftventricular(LV)systolicdyssynchronythantraditionalechocardiographictechniques.ThestudyaimedtoevaluateLVdyssynchronyparametersbyboth2D-STIandRT-3DE,andthecorrelationbetweenthesetwotechniques.MethodsAtotalof43chronicheartfailure(CHF)patientsand27healthyvolunteerswereenrolled.Therewere23dyssynchronyparametersselectedtoevaluateleftventricularsystolicsynchronization,involving15from2D-STIand8fromRT-3DE.ResultsFewofthedyssynchronyparametersshowednegativecorrelationswithLVejectionfraction(LVEF)intheCHFgroup.Thedifferencebetweentimetopeak-systolicradialstrainoftheanteroseptalandposteriorsegmentsatthelevelofpapillarymuscles[AS-P(RS)]from2D-STIshowedpositivecorrelationswithpartsoftheparametersfromRT-3DE(P<0.05).ConclusionsLVsystolicdysfunctiondoesnotcorrelatewithdyssynchrony.Moreover,thereisaweakassociationbetween2D-STIandRT-3DEinassessmentofleftventriculardyssynchrony.

简介：AIMTodescribeathree-dimensionalmodel（3DM）toaccuratelyreconstructanatomicrelationshipsofcentrallylocatedhepatocellularcarcinomas（HCCs）.METHODS：FromMarch2013toJuly2014,reconstructionsandvisualsimulationsofcentrallylocatedHCCswereperformedin39patientsusinga3Dsubject-basedcomputedtomography（CT）modelwithcustomdevelopedsoftware.CTimageswereusedforthe3DreconstructionofCouinaud＇spediclesandhepaticveins,andthecalculationofcorrespondingtumorterritoriesandhepaticsegmentswasperformedusingYorktalDMITsoftware.Therespectivevolume,surgicalmargin,andsimulatedvirtualresectionoftumorswerealsoestimatedbythismodelpreoperatively.Allpatientsweretreatedsurgicallyandtheresultswereretrospectivelyassessed.Clinicalcharacteristics,imagingdata,procedurevariables,pathologicfeatures,andpostoperativedatawererecordedandcomparedtodeterminethereliabilityofthemodel.RESULTS：3Dreconstructionallowedstereoscopicidentificationofthespatialrelationshipsbetweenphysiologicandpathologicstructures,andofferedquantifiableliverresectionproposalsbasedonindividualizedliveranatomy.Thepredictedvalueswereconsistentwiththeactualvaluesfortumormassvolume（82.4±109.1mLvs84.1±108.9mL,P=0.910）,surgicalmargin（10.1±6.2mmvs9.1±5.9mm,P=0.488）,andmaximumtumordiameterthenumberandextentofportalvenousramifications,aswellastheirrelationtohepaticveins,werevisualized.Preoperativeplanningbasedonsimulatedresectionfacilitatedcompleteresectionoflargetumorslocatedintheconfluenceofmajorvessels.Andmostofthepredicteddatawerecorrelatedwithintraoperativefindings.CONCLUSION：This3DMprovidesquantitativemorphometryoftumormassesandastereo-relationshipwithadjacentstructures,thusprovidingapromisingtechniqueforthemanagementofcentrallylocatedHCCs.

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