近几年超声技术不断发展,通过超声显象可诊断胎儿畸形,其效果取决于:①检查者的经验;②花费的检查时间;③超声诊断仪的质量.一、头颅、脊椎及中枢神经系统的畸形1.无脑儿:无脑儿是产前诊断中最常见的畸形,从孕12周起已能超声诊断.纵切面出现典型的外形(鱼雷形);横切面无典型的头颅回声区即可确诊.此外,也常发现胎动异常. In recent years, the continuous development of ultrasound technology, ultrasound imaging can diagnose fetal malformations, the effect depends on: ① examiner’s experience; ② spend the examination time; ③ ultrasonic diagnostic apparatus quality. A head, spine and central nervous system Of deformities 1. No brain children: no brain children is prenatal diagnosis of the most common deformity, from 12 weeks pregnant has been able to diagnose ultrasound. A typical appearance of the longitudinal section (torpedo); cross-section without typical head echo area You can confirm the diagnosis. In addition, abnormal fetal movement is also often found.