双源CT肺动脉造影诊断肺动脉栓塞的扫描技术探讨

Study of scanning technique of dual source computed tomography in the diagnosis of pulmonary embolism

目的探讨肺动脉栓塞的双源CT扫描方法 ,以便更直接准确地显示肺动脉血栓栓塞的部位、形态。方法 13例临床上疑诊肺动脉栓塞,后经双源CT确诊的患者,采用先常规平扫,后经肘静脉注入对比剂快速薄层扫描,并通过工作站三维重建技术对肺动脉主干及分支进行最大密度投影、多平面重建、容积再现等技术进行图像后处理。结果所有病例均获得满意图像,显示肺动脉血栓栓塞累及血管共74支,其中发生在肺动脉主干4支,肺叶动脉22支,肺段动脉血栓者31支,亚肺段及亚亚段肺动脉血栓者17支。栓子表现肺动脉主干或分支腔内充盈缺损。结论双源CT肺动脉造影是一种快速地诊断肺动脉栓塞无创、安全、准确有效的检查方法 。

Objective To evaluate the scanning technique of dual source computed tomography in the diagnosis of pulmonary embolism. Methods 13 cases suspected with pulmonary embolism were included in this study. Routine plane scanning was performed at first, then thin-sliced scanning was performed after bolus contrast injection intravenously. Such post-processing techniques as MIP, MPR and VR were applied to detect embolisms in pulmonary trunk and branches. Results All cases acquired optimal images. Embolisms were detected in 74 branches,including 4 pulmonary trunks,22 lobar arteries,33 segmental arteries, 17 sub-segmental arteries. All the embolisms displayed filling-defect in such involved vessels. Conclusion Dual-source computed tomography would provide an effective and accurate way to diagnose pulmonary embolism.