胎儿中枢神经系统异常的磁共振成像
MR of fetal central nervous system abnormalities.
作者信息
Yuh W T, Nguyen H D, Fisher D J, Tali E T, Gao F, Simonson T M, Kao S C, Weiner C P
机构信息
Department of Radiology, University of Iowa College of Medicine, Iowa City 52242.
出版信息
AJNR Am J Neuroradiol. 1994 Mar;15(3):459-64.
PURPOSE
To investigate whether MR can provide additional information on fetuses with central nervous system abnormalities as demonstrated by ultrasonography.
METHODS
Fetal MR examinations were studied prospectively in 22 pregnant women whose fetuses showed evidence of anomalies on ultrasound performed in the High-Risk Obstetric Clinic.
RESULTS
In 19 of 22 cases, postpartum confirmatory diagnoses were obtained by MR or CT examinations, autopsy, or surgery. In general, the image quality of MR is comparable with that of ultrasound. However, in six of 22 cases (27%), MR provided additional information that altered the ultrasound diagnosis; these included cases of infarction, diastematomyelia, normal hemimegalencephaly with early myelination, Dandy-Walker variant, and lipoma. All of these cases had postpartum confirmation. The additional information changed the treatment in three of six patients (no intervention or elective abortion).
CONCLUSIONS
In certain situations MR can add valuable information to that obtained by sonography in the evaluation of the fetal central nervous system.
目的
探讨磁共振成像（MR）是否能为超声检查显示有中枢神经系统异常的胎儿提供额外信息。
方法
对22例高危产科门诊超声检查显示胎儿有异常迹象的孕妇进行前瞻性胎儿MR检查。
结果
22例中的19例通过MR或CT检查、尸检或手术获得了产后确诊。总体而言，MR的图像质量与超声相当。然而，22例中有6例（27%），MR提供了改变超声诊断的额外信息；这些病例包括梗死、脊髓纵裂、早期髓鞘形成的正常半侧巨脑回、Dandy-Walker变异型和脂肪瘤。所有这些病例均得到产后证实。这一额外信息改变了6例患者中3例的治疗方案（不进行干预或选择流产）。
结论
在某些情况下，MR在评估胎儿中枢神经系统时可为超声检查所获信息增添有价值的内容。
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