在左肺下叶支气管层面上，上段支气管发出。
On the section through left inferior lobar bronchus, superior segmenta1 bronchus appeared.
目的：为左肺下叶支气管的CT显示提供应用解剖学基础。
Objective:To provide the applied anatomic basis for CT demonstration in left lower lobar bronchus.
由于存在着解剖上的差异，右下叶支气管异物较左侧的多。
Because of the anatomical difference, the foreign bodies usually saw in right lower lobar bronchus.
结果患儿均显示异物的直接征象，CT显示异物位于右肺主支气管12例，右中间支气管1例，右下叶支气管2例，左肺主支气管6例。
CT scan showed foreign body was located in right main bronchial 12 cases, right middle bronchial 1 case, right inferior lobar bronchial 2 cases and left main bronchial 6 cases.
脊柱层面，两肺下叶主要表现为上段、外侧底段和后底段的支气管和血管。
On the section through spinal column, the inferior lobes of bilateral lungs mainly showed the bronchi, arteries and veins of superior, lateral basai and posterior basai segments.
脊柱层面，两肺下叶主要表现为上段、外侧底段和后底段的支气管和血管。
On the section through spinal column, the inferior lobes of bilateral lungs shows the bronchi, arteries, and veins of superior, lateral basal, and posterior basal segments mainly.
结论：对右肺下叶底段支气管下部层面作CT扫描可以显示斜裂下部的影像；
Conclusion: The image of the inferior oblique fissure can be showed by the CT scan at the lower level of the basic lobe of right lung.
结论：对右肺下叶底段支气管下部层面作CT扫描可以显示斜裂下部的影像；
Conclusion: The image of the inferior oblique fissure can be showed by the CT scan at the lower level of the basic lobe of right lung.
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