《美国医学会杂志》第247卷第23期第3173页(1982年)报道:迄今超声波多半是用来检查新生儿颅内。通常婴儿在出生后大约18个月囟门才能闭合。范德比尔特大学附属医学院的弗莱谢尔(A C Fleischer)、哈钦森(AlistairHutchinson)及其同事对于孕期不满32周或(和)出生体重不足1,500克出生后第一周 Journal of the American Medical Association, Volume 247, No. 23, p. 3173 (1982) reported that so far the majority of ultrasound is used to check the newborn intracranial. The fontanelle usually closes about 18 months after birth. A C Fleischer, Alistair Hutchinson, and colleagues at Vanderbilt University School of Medicine for less than 32 weeks of pregnancy or less than 1,500 grams of birth weight in the first week after birth