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我们收集了由1955年4月到1958年1月经断层摄影检查的住院患者308例,摄影方法是一次一层投影,焦点膠片距离90厘米,球管移动角70°,曝光时间1秒。其中发现空洞者105名,占断层检查人数的34.1％。105例患者的空洞,都是在从背侧算起的极少。即105例空洞的层次,在5厘米和7厘米处呈现两个高峰。空洞的部位以两上肺野较多,其中右上野多于左上野;两侧中野较少,下野更少。空洞的形状是多样的,其直径最小为0.2×0.3厘米,最大达3×5厘米。
We collected from April 1955 to January 1958 by tomography examination of 308 cases of hospitalized patients, the method of photography is a projection, the focal film distance of 90 cm, the tube movement angle of 70 °, the exposure time of 1 second. Among them, 105 were found to be empty, accounting for 34.1% of the total number of people who had been examined. The empty cavity of 105 patients, are rarely counted from the back. That is, 105 empty levels, with two peaks at 5 and 7 cm. The empty part of the lung field more than two, including the right upper left than the upper field; less on both sides of the field, less under the field. The shape of the hollow is varied, the smallest diameter of 0.2 × 0.3 cm, up to 3 × 5 cm.