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ID:32137840
大小:5.14 MB
页数:40页
时间:2019-01-31
《时间空间相关成像技术对胎儿左室功能的分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Fetalleftcardiacfunctionassessedwithfour-dimensionalultrasoundimagingusingspatiotemporalimagecorrelationAbstractObjeetive:Theobjectiveofthisstudywastoquantifyfetusleftventricularvolumebetween22.39weeksinnormalandpathologicstateswiththespatiotemporalimagecorrelation(STIC)andvirtualorgancompu
2、ter-aidedanalysis(VOCAL).Toestablishtherelationbetweenthenormalfetalleftventricularvolumeandgestation.estimatetheleftheart,Sfunctionbycalculatefetalcardiovascularparameters.InadditionweanalysisfetalventricularvolumeinpathologicstatestodiscussthefeasibilityandaccuracyofSTICestimatethedeforme
3、dfetalheanvolume.Studydesign:Thisstudysuccessfulgathered251women’Sven—tricularvolumedatasets(22-39weeksofgestation)usingtheSTICultrasoundtechnique.244fetusesarenormaland7fetusesareabnorrr'●●·一。mal.1heinclusioncriteriafornormalteamwereuncomplicatedsin。gletonpregnancywithnormalfetalanatomyand
4、growthdemonstrat。edbyultrasoundexamination,andgestafionalagedefinedbyakn-owndateoflastmenstrualperiodandconfirmedbyfetalbiometricmeasurements(HC,AC,FL).Theabnormalfetuseswerediagnosedduri—ngthestudyperiodwithacardiacanomalywereexamined,andth-oseresultsweredemonstratedbydissectionorpostnatal
5、examinationThevolumedatasetsweregatheredduringfetalquiescencewithabdomenuppermost.CardiacventricularvolumeswerecalculatedinVOCALII.W.eidentifyend-systoleandend.diastolebyscrollingthr-ougheachframeandidentifyingtheimageprecedingtheAVvalveopening(systole)andfollowingAVvalveclosure(diastole).T
6、heinnercontourofleftventricularin12planesweredrawnmanually,Thenavolumewascomputed.Thevolumedatasetswereusedtocalculates仃okevolume(SV),cardiacoutput(CO),andejectionfraction(EF).ThisstudyadjustedCObytheestimatedfetalweight(EFW),HC,AC,FLandanalysistherelationbetweenallparametersandgestation.IV
7、Result:Theresultmadefromthenormalteamwere:1、l1eftv.entricularvolume(bothsystoleanddiastole),SV,COincreasedwitha-dvancinggestationalage0
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