根据2000年发表在《放射线学》一项研究，孕期第24周时，磁共振成像显示，在胎儿原本平滑的大脑皮层上出现了一些新的沟槽。
At 24 weeks, magnetic resonance imaging shows just a few nascent grooves in the otherwise smooth surface of the fetal brain, according to a 2000 study in the journal Radiology.
磁共振成像作为超声检查的有力补充，是确诊胎儿脑发育畸形的最终手段。
Magnetic resonance imaging as a powerful complement to ultrasonography, is the ultimate means of diagnosing fetal brain deformity.
目的：探讨磁共振成像（MRI）在产前诊断胎儿异常中的临床应用价值。
Objective : To explore the clinical applied value of magnetic resonance imaging (MRI) in prenatal diagnosis, especially in congenital anomalies.
材料和方法：采用超导0．35T磁共振成像仪，对44例中、晚孕程孕妇进行MR成像，观察、分析其中42例正常胎儿肝脏的形态结构、信号变化。
Materials and methods: 44 pregnant women were imaged with MR at 0.35T. The structures and signals of 42 normal fetus were analyzed.
结论：磁共振成像技术是超声发现胎儿异常的重要验证和补充诊断手段，在产前诊断胎儿缺陷中具有重大的临床价值。
Conclusion : MRI has its own advantages and is an important supplement to US in fetal disorder, which can educe momentous clinical value in prenatal diagnosis.
结论：磁共振成像技术是超声发现胎儿异常的重要验证和补充诊断手段，在产前诊断胎儿缺陷中具有重大的临床价值。
Conclusion : MRI has its own advantages and is an important supplement to US in fetal disorder, which can educe momentous clinical value in prenatal diagnosis.
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