” 美国等发达国家将产科超声检查分为二个层次:一个层次是常规超声检查(routine ultrasound examination)，另一个 层次是以检测胎儿畸形为目的超声检查（targeted imaging for fetal anomalies，TIFFA）。
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常规超声检查观察肾占位大小、回声、边界、有无彩色血流信号。
The size, echo, boundary and color flow signals of renal lesions were observed by conventional US.
方法通过28例新生儿常规超声检查和高频超声检查进行对比、评价。
Methods Biliary tract imaging using routine ultrasound and high-resolution ultrasound were performed in 28 newborns.
结论常规超声检查对胎儿成骨发育不全的筛检有着重要意义，为产前诊断胎儿骨骼发育异常的首选方法。
Conclusion: Conventional ultrasound plays an important role in checking fetal dysostosis and is the first method in diagnosing the fetal dysostosis before birth.
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