笔者采用动态放射照片法，观测了１０５例正常人的气管分叉角，其移动度以及主支气管下壁厚度的Ｘ线解剖正常值。另外，３５例食管癌病人的气管分叉角变化和移动度也进行了测量。两组测量结果的对照证明气管分叉角区的动态放射照片法对于食管癌手术可能和预后的估计具有十分重要的意义。 The author used dynamic radiography to observe the normal angle of the tracheal bifurcation angle of 105 normal people, their mobility and the thickness of the main bronchial wall. In addition, 35 patients with esophageal cancer tracheal bifurcation angle changes and mobility were also measured. The contrast between the two sets of measurements proves that the dynamic radiographic method of the tracheal bifurcation angle area is of great significance for the estimation of the possible and prognosis of esophageal cancer surgery.