文档介绍：中国医学影像技术 年第 卷第 期
􀅰１１６􀅰 ２０２２ ３８ １ ChinJ Results
relationshipwithcrownＧrumplength wereobservedontransversesectionofthalamuswithultrasound． Among
２１６fetuses,２０４(including４５,９９and６０fetusesrespectivelyingroupA,BandC)clearlyshowedmidbrainaqueduct,and
noobviousabnormalityofcentralnervoussystem wasfoundwithprenatalultrasound．Therewasnosignificantdifference
χ２ P
ofdisplayrateamonggroupA,BandC ( ＝２􀆰５０７, ＝０􀆰２８６)．Themidbrainaqueductwasnotclearlydepictedin１２
fetuses,including１０fetuseswithoutobviousabnormalityofcentralnervoussystem,１fetuswithobstructivehydrocephalus
andtherest１withopenspinabifidacomplicatedwithhydrocephalus．Thepregnanciesofthelatter２wereterminated,and
theresultsofautopsywereconsistentwiththoseofprenatalultrasound．Noobviousabnormalitywasfoundduringcentral
nervoussystemexaminationsof２１４newborns．Correlationandregressionanalysisshowedthattherewasalinearnegative
r P
correlationbetweenfetalcrownＧrumplengthandleftＧrightdiameterof midbrainaqueduct ( ＝ －０􀆰１６８, ＜０􀆰０５)．
Conclusion