摘要
目的探讨联合应用MRI及超声对胎儿脑室扩张病因的诊断价值,为临床诊断提供依据。资料与方法 45例超声提示胎儿脑室系统异常或可疑异常的单胎妊娠孕妇行MRI检查,根据病因及脑室扩张程度分为孤立性轻度侧脑室增宽(IMV)、非孤立性轻度侧脑室增宽(N-IMV)及脑积水、颅内囊肿继发脑室扩张、第四脑室扩张,比较超声与MRI诊断结果的符合情况。结果 MRI与超声一致诊断IMV、N-IMV、颅内囊肿、Dandy-Wakler畸形分别为11例、15例、2例、2例,诊断一致率为66.7%。MRI补充超声诊断IMV、N-IMV、颅内囊肿、第四脑室扩张分别为3例、6例、1例、1例,补充诊断率为24.4%。MRI更正超声诊断IMV 1例、第四脑室扩张2例,更正诊断率为6.7%,1例(2.2%)超声提示异常而MRI未显示。结论胎儿脑沟回、脑室系统形态、脑中线结构如胼胝体、透明隔腔及后颅窝等结构异常,MRI较超声具有更大的诊断价值,是超声检查的重要补充。
Purpose To explore the application of MRI combined with ultrasonography（US） in diagnosis of fetal ventricle system abnormities,and to provide basis for clinical diagnosis.Materials and Methods Forty-five cases of singleton pregnancy with fetal ventricle abnormalities or suspected abnormities by US underwent MRI examination.According to the cause and the extent of ventricle system expansion,the subjects were divided into isolated mild ventriculomegaly（IMV）,non-isolated mild ventriculomegaly（N-IMV）,hydrocephalus,ventricular dilatation secondary to intracranial cysts and the forth ventricle dilatation.Findings of MRI were compared with those of US.Results IMV,N-IVM,intracranial cysts and Dandy-Walker diagnosed by both MRI and US were 11 cases,15 cases,2 cases,and 2 cases,respectively,and diagnosis consistency was 66.7%.Three cases of IMV,6 cases of N-IVM,1 case of intracranial cysts and 1 case of the forth ventricle dilatation were diagnosed by MRI but not by US.MRI modified US diagnosis of IMV in 1 case and the forth ventricle dilatation in 2 cases,correction rate was 6.7%.US detected abnormality in 1 case（2.2%） but MRI showed normal.Conclusion MRI is superior to US in detecting gyrus,ventricular system morphology,midline structures such as the corpus callosum,septum pellucidum cavity as well as the posterior fossa structures,which is an important complement to US.
出处
《中国医学影像学杂志》
CSCD
北大核心
2016年第7期486-489,493,共5页
Chinese Journal of Medical Imaging
基金
长沙市科技局指导性科技计划项目(K10ZD036-13)
关键词
脑室
扩张
病理性
磁共振成像
超声检查
产前
胎儿
Cerebral ventricles
Dilatation
pathologic
Magnetic resonance imaging
Ultrasonography
prenatal
Fetus
