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ID:33005454
大小:1.50 MB
页数:36页
时间:2019-02-19
《高场mri在胎儿胼胝体发育过程与超声疑诊胼胝体发育不全胎儿中的应用价值》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、山东人学坝lj学位论文ValueofhighfieldMRIondevelopmentofhumanfetalcorpuscallosumandfetalcorpuscallosumagenesisforUSsuspected.ABSTRACTObject1.Toestablishreferencerangesduringhumanpregnancyforno肌aIfetalcorpuscallosumdimensionsbyMRImeasurementsandstatistical觚alysis,facilitateamor
2、eobjectivediagnosisoffetalcorpuscallosumagenesis;2.ToexplorethevalueofMRIoncorpuscallosumagenesisforUSsuspected,comparisonwiththeimagingmanifestationandclinicalvalueofMRIandUS.Method1·Collectionof55normalfetusescasesdiagnosedbyMRIduring2005.2007,gestationalagefrom24
3、to36weeks,52fetusesabovefitformeasurementofMRI"rE。weightedMRimagingWasperformedusingHASTEandTi-weightedMRimagingwasusingFLASH.Onthebaseoffetalbrain’Sanatomicalstructurewasnormalviewingbymulti。planeimagineofMRI,thelengthoffetalcorpuscallosumandtheanteroposteriordiame
4、terofthebrainwasmeasuredatthemid.sagittalplane,thewidthWasmeasuredatthemid—coronalplane,thenstatisticsanalyzetheoutcomeofthemeasureandcalculatetheratioofthelengthofthecorpuscallosumtotheanteroposteriordiameterofthebrain.2.AfterprenatalscreeningbyUSusinghighresolutio
5、ntransabdominaltransducers,19casesarefetalcorpuscallosumagenesissuspected,theageofpregnantwomenisfrom20to37yearsold(average28years)andwithgestationfrom20to38weeks(average29weeks)werestudiedwitha1.5TsuperconductiveMRunitwithin24hours.T2一weightedMRimagingwasperformedu
6、singHASTEandTi。weightedMRimagingWasusingFLASH.ComparisonwiththediagnosisofMRIandUltrasoundweredonewithautopsyorfollow-upoutcomeandtheimagingmanifestationandclinicalvalueofMRIandUS.Results1·Thelengthandwidthoffetalcorpuscallosumshowagradualincreaseduringpregnancyfrom
7、24to36weeksandincreasedinalinearfashion.Thesizeofthe4山东人学坝Ij学位论文corpuscallosumasafunctionofgestationalagewasexpressedbyregressionequations:length(mm)=一4.349+1.395×gestationalage(weeks);width(turn)=0.744+0.244Xgestationalage(weeks).Thedimension—gestationalagecorrelat
8、ioncoefficientswere:r=0.875forlengthandr=0.604forwidth.thesewerestatisticallysignificant(P
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