羊水过少时胎儿畸形的磁共振诊断价值

董素贞;朱 铭;毛建平;钟玉敏;顾晓红

中国临床医学影像杂志 ›› 2008, Vol. 19 ›› Issue (1) : 51-55.

中国临床医学影像杂志 ›› 2008, Vol. 19 ›› Issue (1) : 51-55.
论著

羊水过少时胎儿畸形的磁共振诊断价值

  • 董素贞1,朱 铭1,毛建平2,钟玉敏1,顾晓红1
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Diagnosis of abnormalities of fetus with oligohydramnios by MRI

  • DONG Su-zhen1, ZHU Ming1, MAO Jian-ping2, ZHONG Yu-min1, GU Xiao-hong1
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摘要

目的:评价磁共振成像(MRI)对羊水过少时胎儿畸形的诊断价值。方法:回顾性分析18例超声筛查出羊水过少胎儿的MRI,并将超声、MRI结果与引产后或出生后随访结果对照。通过MRI采用感兴趣区工具(ROI)测量胎儿肺肝信号强度比(LLSIR),采用t检验进行统计学分析。结果:18例羊水过少胎儿MRI均能清晰显示其结构,泌尿系统畸形13例(其中同时伴肺发育不良6例、同时伴肺发育不良和心脏畸形2例、人体鱼序列征1例、中枢神经系统畸形1例、单脐动脉1例),腹腔囊肿2例,中枢神经系统畸形1例,2例胎儿无明显畸形。除3例引产未尸检外,其余MRI结果均由出生或引产后结果证实。结论:MRI是羊水过少时胎儿畸形有效的影像诊断方法,它能明确诊断羊水过少时的胎儿肾脏及肺异常,发挥超声的重要补充作用,尤其是超声显示不清时。

Abstract

Objective: To evaluate the value of MRI on abnormalities of fetus with oligohydramnios. Methods: The prenatal MR images of 18 women with oligohydramnios diagnosed at US were analyzed retrospectively and compared with prenatal ultrasounds or autopsy or postnatal follow-up imaging examinations. Calculation of the ratio of lung signal intensity to liver signal intensity(LLSIR) was performed on MR images by using region-of-interest analysis. t test was performed. Results: MRI can clearly display all normal structures and abnormalities of 18 fetuses with oligohydramnios. The abnormalities of 18 fetuses with oligohydramnios included genitourinary anomaly(n=13), cystic abdominal mass (n=2), central nervous system abnormality(n=1), normal fetus(n=2). The anomalies of 13 fetuses with genitourinary anomaly associated with pulmonary hypoplasia(n=6), cardiac anomaly complicated with pulmonary hypoplasia(n=2), sirenomelia sequence (n=1), central nervous system abnormality(n=1), single umbilical artery(n=1). MRI findings were confirmed in 15 of the 18 fetuses at autopsy or postnatal follow-up; no follow-up data were available for the other 3 fetuses. Conclusion: Prenatal MRI is effective in the assessment of anomalies of fetuses with oligohydramnios. It can accurately diagnose abnormalities of fetus kidneys and fetus lungs with oligohydramnios and is a useful complementary tool to US, particularly in cases with inconclusive sonographic findings.

关键词

畸形 / 胎儿 / 羊水过少 / 磁共振成像

Key words

Abnormalities / Fetus / Oligohydramnios / Magnetic resonance imaging

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导出引用
董素贞;朱 铭;毛建平;钟玉敏;顾晓红. 羊水过少时胎儿畸形的磁共振诊断价值[J]. 中国临床医学影像杂志. 2008, 19(1): 51-55
DONG Su-zhen;ZHU Ming;MAO Jian-ping;ZHONG Yu-min;GU Xiao-hong. Diagnosis of abnormalities of fetus with oligohydramnios by MRI[J]. Journal of China Clinic Medical Imaging. 2008, 19(1): 51-55
中图分类号: R714.53    R445.2   

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