磁共振成像评价中晚期妊娠胎儿后颅窝池的价值  

The value of MRI in the evaluation of the posterior fossa cistern of the fetus in the middle and late pregnancy

作　　者：逄利博 王晨 陈刚[1] 刘敏[2] Pang Libo;Wang Chen;Chen Gang;Liu Min(CT/MRI Room,Imaging Department,Xuzhou Central Hospital,Xuzhou 221009,Jiangsu,China;Department of Ultrasound,Xuzhou Central Hospital,Xuzhou 221009,Jiangsu,China)

机构地区：[1]徐州市中心医院影像科CT/MR室,江苏徐州221009 [2]徐州市中心医院超声科,江苏徐州221009

出　　处：《中国产前诊断杂志（电子版）》2021年第3期49-52,共4页Chinese Journal of Prenatal Diagnosis(Electronic Version)

摘　　要：目的 通过对胎儿后颅窝池增宽的磁共振(magnetic resonance,MR)和超声影像的诊断分析,探讨应用磁共振影像(magnetic resonance imaging,MRI)评价的临床价值。方法 产前MR诊断胎儿后颅窝池增宽的中晚期妊娠孕妇102例,均1~2周前行超声检查,采用1.5T MR机2DFIESTA、2D Balance FFE序列,胎儿头部二次定位后行横断面、冠状面、矢状面扫描。结果 MR诊断后颅窝池增宽102例,伴侧脑室扩张68例,蛛网膜下腔增宽29例,前全脑畸形1例,大脑发育不良4例,小脑发育不良2例,蛛网膜囊肿8例(后颅窝池蛛网膜囊肿6例),Blake囊肿1例,不典型Blake囊肿1例,Dandywalker畸形2例,不典型Dandy-walker畸形18例,胼胝体发育不良4例,侧脑室穿通畸形2例;单纯性后颅窝池增宽34例。超声诊断后颅窝池增宽56例,伴侧脑室扩张29例,Dandy-walker畸形1例,不典型Dandy-walker畸形3例,侧脑室脉络丛囊肿3例;单纯性后颅窝池增宽27例。结论 MR影像较超声对胎儿后颅窝池增宽测量更具优势,并能发现引起后颅窝池增宽的小脑异常及伴发的大脑异常,中晚期妊娠胎儿MR检查的应用对提高产前诊断质量具有重要价值。Objective To investigate the clinical value of magnetic resonance(MR)imaging in the evaluation of fetal posterior fossa cistern enlargement by analyzing the magnetic resonance imaging(MRI)and ultrasound images.Methods 102 pregnant women in the middle and late stages of pregnancy with enlarged posterior fossa cistern diagnosed by prenatal MR were examined by ultrasonography 1~2 weeks ago.2D FIESTA and 2D Balance FFE sequence were performed on 1.5 T MR machine,and the transverse,coronal and sagittal scans were performed after the second positioning of fetal head.Results MRI diagnosis of posterior fossa cistern enlargement in 102 cases,68 cases with lateral ventriculomegaly,29 cases with subarachnoid space enlargement,1 case with anterior whole brain malformation,4 cases with cerebral dysplasia,2 cases with cerebellar dysplasia,8 cases with arachnoid cyst(6 cases with posterior fossa arachnoid cyst),1 case with Blake cyst,1 case with atypical Blake cyst,2 cases with Dandy-Walker malformation,18 cases with atypical Dandy-Walker malformation,4 cases with callosal agenesis,2 cases with porencephalia of lateral cerebral ventricle,34 cases of simple posterior fossa cistern enlargement.Ultrasound diagnosis of posterior fossa cistern enlargement in 56 cases,with lateral ventricular dilatation in 29 cases, Dandy-Walker malformation in 1 case,atypical Dandy-Walker malformation in 3 cases,choroid plexus cyst in lateral ventricle in 3 cases,and simple posterior fossa cistern enlargement in 27 cases.Conclusion MRI has more advantages than ultrasound in measuring the enlargement of posterior fossa cistern,and can find the cerebellar abnormalities and associated brain abnormalities that cause the enlargement of posterior fossa cistern.The application of fetal MR examination in middle and late pregnancy is of great value to improve the quality of prenatal diagnosis.

关 键 词：胎儿后颅窝池 磁共振成像 产前超声 

分 类 号：R714.53[医药卫生—妇产科学] R445.2[医药卫生—临床医学]