Methods Subarachnoid cistern of head CT of 311 adults in Yanbian (male 192,female 119)were measured with 5 items and the data were tereated by means of analysis of variance and U-test.

• 方法对延边地区311名健康成人(男192、女119名)的头部CT片进行了5种蛛网膜下池测量，并做了方差分析和u检验。