64层螺旋CT在肺动脉栓塞检查中的成像方法

Methods and Technique of 64-MSCT in Detecting Acute Pulmonary Embolism

目的探讨64层螺旋CT肺动脉造影成像方法、技巧,以便更直接准确地显示肺动脉栓塞的血栓部位、形态特点。方法对15例临床上疑诊肺动脉栓塞患者先行常规平扫,后经肘静脉注入对比剂行64层螺旋CT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、容积再现等成像,探索肺动脉CTA成像的最佳参数及操作技术。结果15例患者检出肺动脉栓塞7例,肺段动脉栓子49支,亚肺段动脉栓子25支,栓子表现肺动脉主干或分支腔内充盈缺损。结论64层螺旋CT肺动脉成像是一种能够可靠地用于临床怀疑急性肺栓塞患者的无创、安全、快速、有效的检查方法。

Objective To investigate the imaging methods and technique with 64-MSCT for detecting acute pulmonary embolism（PE）. Methods 15 patients with clinically suspected PE were enrolled in this study. After the thorax plain CT scan and intravenous administration of contrast, each paitient underwent high-speed, thin-layer 04-MSCT scan for CT pulmonary angiograpny （CTPA）. We also performed multiplana： reconstruction and 3-dimension rendition to provide ＂lifelike＂ view of the main pulmonary artery and its branches. We pick out the suitable parameter and optimize the scan process, also evaluate the value of CTPA for detecting PE,in order to observe the location and configuration of thrombi accurately. Results 7 patients with PE were revealed,the presence of PE was seen as filling defect in. Conclusion CTPA by 64-MSCT is a new modality for detecting PE,and it is noninvasive,safe,practical and effective.