目的 探讨多层螺旋CT肺动脉CTA 在肺动脉栓塞中的诊断及疗效观察价值。 方法 本研究分析我院2013.01-2014.12收 治及门诊疑似肺动脉栓塞患者163例，全 部行肺动脉CTA，并行VR、MPR、CPR、MIP 重建，分析肺动脉CTA在肺动脉栓塞中的 表现及在疗效观察中的变化。结果 本组 病例163例，其中阳性112例，阴性51例， CTA显示直接征象为：骑跨形缺损、中心 性或偏心性充盈缺损，肺动脉完全阻塞， 其中83例患者经临床溶栓治疗后CTA复 查，均出现不同程度的好转，其中49例肺 动脉栓塞征象完全消失。结论 CTA在肺动 脉栓塞诊断及疗效观察中具有十分重要的 应用价值。

Objective To assess the value of pulmonary CT angiography(CTA) in diagnosis and clinical observation of pulmonary embolism(PE) by Multi-slice CT (MSCT). Methods One hundred and sixty three patients from 2013.01 to 2014.12 who were diagnosed or suspected with PE underwent CTA and the images were transferred to the computer workstation subsequently post-processed using volume rendering (VR),multiplaner reformation (MPR),curved planar reformatting (CPR), maximum intensity projection (MIP) to analyse the manifestation of PE and the variation on clinical observation of PE. Results One hundred and twelve cases were positive,and else were negative.Pulmonary vessels with embolism were conformed by the direct signs of CT which was filling-defect of saddle type, central type, eccentric type or complete type. Eighty-three patients with pulmonary artery completely blocked were improved in varying degrees after clinical treatment with thrombolysis by re-examination of CTA, and forty-nine of that were completely cured. Conclusion It is conformed that CTA in diagnosis and clinical observation of pulmonary embolism has an important application value.