产前超声检查颅脑结构

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1、本资料转帖于下面网站http://www.sonoworld.com/Sonoworld/Chapter/ShowTextBookChapter_Test.aspx?bid=4&cid=32版权声明：本译文文字内容归丁香园网站（http://www.dxy.cn）所有，未经网站书面许可，请勿转载或摘编。违者必究!NORMALANATOMYEvaluationofthefetalcentralnervoussystem(CNS),includingthecerebralventricles,posteriorfossa(includingcerebellarh

2、emispheresandcisternamagna),andthespinehasbeenrecommendedasaguidelineforperformanceofantenatalobstetricultrasound.(1)Otherinvestigatorsbelievethatacomprehensiveapproachtoevaluationofthefetalheadinthesecondandthirdtrimestersofpregnancyincludesvisualizationof(1)theventricularatrium,(

3、2)thecisternamagna,and(3)thecavumseptipellucidi.Visualizationofthesethreeanatomicregionsonstandardimagingplanesexcludesthediagnosisofmostintracranialabnormalities.(2)正常解剖作为产前超声检查的方针之一，对胎儿中枢神经系统（CNS）包括脑室、后颅窝（包括小脑半球和小脑延髓池）、和脊柱的评估已受到重视。其他的研究者认为以综合方法评估妊娠第二、三期的胎头包括显示（1）脑室腔，（2）小脑延髓池，（3）透

4、明隔腔。这三个解剖区域在标准成像切面上的显示排除了大多数颅内异常的诊断。0票票数nxxeditedon2006-01-1220:15举报·HD7傲影彩色多普勒诊断系统-飞利浦·【继续教育专题讲座系列】产科超声---胎儿头部和脑·【继续教育专题讲座系列】产科超声---胎儿头部和脑－－以后很受感动，特发此组图片以表支持！·【继续教育专题讲座系列】产科超声之:胎儿腹部及盆腔hzdd·43积分·2得票·0粉丝2006-01-1013:30消息引用收藏分享分享到哪里？·复制网址·新浪微博·豆瓣社区·腾讯微博·开心网·人人网VentricularAtriumThe"do

5、wnside"ventricularatriumcanbevisualizedin99%ofnormalfetuses.(2)Theventricularatriumisbestvisualizedonastandardized加关注transaxialplanetakenthroughthefetalcranium.Theventricularatrium,atthislevel,remainsstableinsizethroughoutthesecondandthirdtrimestersofpregnancy.[10.1]Thenormalventri

6、cularatriumhasameandiameterbetween6and7mm.Ameasurementof10mmis4standarddeviationsabovethemean(3)andisconsideredthecutoffbetweennormalandabnormalsizeoftheventricularatrium(2,3)(Fig.10-1A-B,Fig.10-1C,andFig.10-2).Morerecently,Alagappanandassociatesstudiedalargerpopulationof500normalf

7、etusesandfoundthemeanvalueforthedownsideventricularatriumtobe6.6mm.Thestandarddeviationinthisstudypopulationwaslarger,however,at1.4mm.Therefore,using2.5standarddeviations,theseinvestigatorsestablished10mmastheupperlimitofnormalinthispopulation.(4)Datahavedemonstratedthefeasibilityo

8、fvisualizingtheproximalor"