MSCT支气管动脉三维成像对中心型肺癌的血供研究

目的：探讨多层螺旋CT(MSCT)三维支气管动脉成像在中心型肺癌中的影像学表现．为显示中心型肺癌的血供来源及介入治疗提供理论依据。方法：对18例中心型肺癌的患者行MSCT造影增强检查，采用实时螺旋薄层CT扫描，在独立工作站行支气管动脉三维重建，使用不同的旋转轴观察支气管动脉的空间解剖细节。结果：其中6例(33．33％)中心型肺癌的支气管动脉三维图像能够清晰显示出支气管动脉的起源、走行的路径(肺内段和纵隔段)和血管直径等。有肺动脉明显狭窄截断的病例支气管动脉显示率最高，且明显增粗，表明此类肺癌的血供来源主要以支气管动脉为主。三维成像中以容积再现(VR)技术显示最佳。结论：MscT三维支气管动脉成像能够准确、直观地显示支气管动脉的空间解剖特点，为中心型肺癌的血供研究及介入治疗提供理论基础。

Three-dimensional imaging of multi-slice spiral CT of bronchial artery: study on blood supply of central lung cancer

Objective:To evaluate three dimensional imaging of multi slice spiral CT (MSCT) of bronchial artery to provide theoretical and practical basis on blood supply and interventional therapy of central lung cancer.Methods:MSCT angiography was performed in 18 patients with central lung cancer,with real time helical thin slice CT scanning.Three dimensional images of bronchial artery were processed at the console workstation.Spatial anatomical characters of bronchial artery using different rotation of view were observed.Results:Among them,bronchial artery in 6 cases (33.33%) with central lung cancer on three dimensional images could exactly be shown about their origin,route (intrapulmonary segment and mediastinum segment) and diameter of bronchial artery.Rate of demonstration of bronchial artery was higher in pulmonary artery stricture and truncation groups,and its diameter became thicker evidenctly.These findings indicated that the central lung cancer was mainly supplied by bronchial artery.Volume rendering images were the best among these three dimensional images.Conclusion:Three dimensional imaging of MSCT of bronchial artery can reveal the anatomical characters of bronchial artery,provide theoretical evidence on blood supply and interventional therapy of central lung cancer.