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目的综合应用64层螺旋CT3种图像对左肺段级支气管的分支形式进行分类,并探讨CT横断面图像辨认主要分支类型的规律。方法216例门诊患者胸部CT常规扫描资料,重组左肺支气管树、仿真内镜及薄层CT横断面图像,综合应用3种图像对216例左肺段支气管资料分型,探讨CT横断面图像辨认主要分支类型的规律。结果左肺上叶依据上干支气管分支的不同分为3种主要类型,Ⅰ型130例(64):上干分为尖后段支气管和前段支气管;Ⅱ型45例(23):上干分为尖、后、前段支气管;Ⅲ型21例(10);上干分为尖前段及后段支气管。左肺上叶3种主要分支类型可以通过薄层CT横断面图像2个典型层面辨认;左肺下叶依据基底干支气管分支的不同分为2种主要类型,Ⅰ型163例(75):基底干支气管两分支,即内前底段支气管、外后底段支气管;Ⅱ型39例(18):基底干支气管3分支,即内前底段、外侧底段、后底段支气管。下叶两种主要分支类型可以通过薄层CT横断面图像2个典型层面辨认。结论64层螺旋CT多种重组图像综合应用可以真实直观地显示左肺段级支气管分支形式并对其准确分型。
OBJECTIVE: To classify the branches of bronchus of the left lung segment by using three-dimensional images of 64-slice spiral CT and discuss the regularity of identifying the main branch types by CT cross-sectional images. Methods Totally 216 cases of thoracic CT scan of 216 outpatients, reconstructed left lung bronchial tree, simulated endoscopy and thin-section CT cross-sectional images were used to classify 216 cases of left lung bronchus The main branch of the law. Results The left upper lobe was divided into three main types according to the branches of the upper stem, type I 130 (64): the upper stem was divided into the posterior segment bronchus and the anterior segment bronchus; type II 45 (23) For the sharp, after the anterior bronchial; type 21 cases (10); on the stem is divided into the anterior and posterior segment of the bronchus. The three main branches of the left upper lobe can be identified by two typical slices of the transverse CT image. The left lower lobe is divided into two main types according to the basal stem and bronchial branches. Type I 163 (75) Bronchial two branches, namely the anterior end of the bronchus, the posterior segment of the bronchus; type â ... ¢ 39 cases (18): basal stem bronchus 3 branches, namely, the anterior segment, lateral segment, the posterior segment of the bronchus. The two main branches of the lower lobe can be identified by two typical levels of the cross-sectional images of the thin layer CT. Conclusion The comprehensive application of multiple reconstruction images of 64-slice spiral CT can truly and intuitively display the left lung stage bronchus branch form and accurately type it.