摘要
目的：揭示发育期小儿脑室及脑外间隙随月龄变化的特征。材料和方法：选１００例２岁以内没有神经系统疾病的小儿，按月龄分７组，在Ｔ１ＷＩ上测量脑室大小，在加重Ｔ２加权像（ＨＴ２ＷＩ）上测量脑外间隙、外侧裂、纵裂的宽度。结果：（１）３～６个月时脑室前角指数、尾状核指数分别为０．３１±０．０４、０．１６±０．０３；（２）婴儿脑外间隙显示双层结构者占５０．８％，３～６个月时额叶及颞极前方脑外间隙、外侧裂、纵裂宽度分别为３．３１±１．２９ｍｍ、４．２５±２．３４ｍｍ、５．４８±１．８６ｍｍ、３．３８±１．３７ｍｍ；（３）侧脑室前角形态分三种，蜡烛台形２８．０％、Ｙ形６７．０％、平行形５．０％；新生儿透明隔腔占８３．３％。结论：（１）脑室指数中，前角指数和尾状核指数最可靠，是判定脑室大小的依据；（２）新生儿期存在透明隔腔是正常的。侧脑室前角形态在新生儿期以蜡烛台形为主，婴儿期以Ｙ形为主；（３）脑外间隙在３～６个月时最宽，脑外间隙可分出蛛网膜下腔和硬膜下腔。
Purpose:Tomeasuretheventricularsizeandextracerebralspaceofnormalneonatesandinfants.Materialsandmethods:Onehundredcaseswithin2yearsofageandwithoutsignificantneurologicsymptomswereselectedforstudy.Theyweredividedinto7agegroups.TheventricularsizewasmeasuredonT1WI,thewidthofextracerebralspace,sylvianfissureandintercerebralfis-sureweremeasuredonheavyT2WI.A0.35Tsuperconductivemagnetwasused.Results:(1)Theextracerebralspaceofinfantscouldbediferentiatedintotwopartsin50.8%ofcases.Thewidthoftheextracerebralspaceatthefrontal,temporal,sylvianfissure,andintercerebralfissurewere3.31±1.29mm,4.25±2.34mm,5.48±1.86mm,3.38±1.37mmrespectively.(2)Theshapeofthefrontalhornswereofcandlesticktypein28%,Yshapein67%andparalelshapein5%.Septalpel-lucidumspaceexistedinmostnormalneonateswithanincidenceof83.3%.Conclusion:(1)Amongtheventricularindices,thebifrontalindexandbicaudateindexweremostreliableandcouldbeusedtoevaluatethesizeoftheventricles.(2)Presenceofseptalpelucidumspaceduringnewbornwasconsideredtobenormal.Thetwoventricleswerepredominentlycandlestickinshapeduringnewbornperiod,andYshapeininfants.(3)Thewidthofextracerebralspacewaswidestduring3-6months,atwhichtimetheextracerebralspacecouldbediferentiatedintotheinnersubarachnoidspaceandtheoutersubduralspace.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1996年第12期850-854,共5页
Chinese Journal of Radiology
关键词
脑室
婴儿
成像
新生儿
脑外间隙
NMR
CerebralventriclesMagneticresonanceimagingInfant,newborn
