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(八)支气管支气管的分布在普通X线片上是看不见的。从肺门处出发向两肺野内分布的肺纹理是肺血管的阴影,并不是支气管阴影。只有用碘油造影后才能看到它的分布情况。在碘油造影片上,成人的气管在第5或第6胸椎、有时在第7胸椎的同高处分为左右两总支气管(在屍体解剖时,位于第4或第5胸椎处)。右总支气管与气管所造成的角度为19°-20°,左总支气管的角度较大,为40°-50°,左右两总支气管分叉的角度约为60°-70°。这些角度因人和因年龄而異。
(8) The distribution of bronchial bronchi in the ordinary X-ray film is invisible. Pulmonary origin from the hilar to the distribution of the lungs in the lungs of the lungs is the shadow of the lungs, not the bronchial shadow. Only with lipiodol angiography can see its distribution. In lipiodol films, the adult trachea is divided into left and right total bronchi at either the 5th or 6th thoracic spine, sometimes at the same height as the 7th thoracic spine (at the 4th or 5th thoracic spine when autopsied). Right total bronchus and trachea caused by the angle of 19 ° -20 °, the left total bronchus angle is larger, 40 ° -50 °, about two bronchial bifurcation angle of about 60 ° -70 °. These perspectives vary from person to person and from age to age.