无脑儿是一种胎儿的发育畸形,常合并羊水过多,其发生率占出生数的0.5‰～0.5％。自从1972年Campbell等报道第一例无脑儿早期超声诊断以来,陆续有这方面的报告。本文系我室应用B型超声切面显象法诊断三例无脑儿的报告。仪器条件及检查方法我们采用日本东芝公司出产的SSL-31A型超声显象仪,频率为2兆赫(MHz),探头 No brain children is a fetal developmental deformity, often associated with polyhydramnios, the incidence of births accounted for 0.5 ‰ 0.5%. Campbell and other reports since 1972, the first case of no brain ultrasound early diagnosis, one after another in this area. This article is my room application of B-mode ultrasound imaging of the diagnosis of three cases of brainless children report. Instrument conditions and inspection methods We use Japan’s Toshiba SSL-31A produced by the type of ultrasound display at a frequency of 2 megahertz (MHz), the probe