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.
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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