摘要
目的:探讨16层螺旋CT对肺动脉栓塞的诊断价值。方法:回顾性分析经临床确诊为肺动脉栓塞的23例患者的16层螺旋CT资料,分析PE的直接征象、间接征象及分型,比较常规横断面图像、MPR、VR和MIP图像对栓子的显示效果。结果:23例患者CT共发现栓子345个,其中中心型栓子67个,附壁环型115个,完全闭塞型37个,不完全闭塞型126个。间接征象包括马赛克征2例,肺梗死3例,胸腔积液5例,肺动脉高压5例。横断面图像共检出栓子345个,MPR共检出320个,与横断面图像比较,MIP和VR图像对栓子的显示效果(分别为164和82个)相对较差(P<0.05),尤其是对肺叶及其以下肺动脉分支内栓子的显示效果明显低于横断面组(P<0.05)。结论:16层螺旋CT能清楚显示肺动脉栓子,MPR、MIP及VR等图像重组方法是诊断肺栓塞的重要辅助方法,结合使用可提高诊断的准确性。
Objective：To investigate the value of 16-slice spiral CT in the diagnosis of pulmonary embolism （PE）. Methods： Using 16 slice spiral CT,the direct signs,indirect signs and the subtypes of clinically diagnosed PE in 23 patients were retrospectively analyzed. The efficacy of images in displaying the embolus on axial plane, multi-planar reformation （MPR） ,volume rendering （VR） and maximal intensity projection （MIP） were compared. Results： Of the 23 patients with pulmonary embolism, altogether 345 emboli were detected by 16-slice CT, 67 of which were central type, 115 were mural encircling type, 37 were complete occlusion type, 126 were incomplete occlusion type. Indirect signs consisted of mosaic sign （ n = 2）, pulmonary infarct （ n = 3 ）, pleural effusion （n = 5 ）, pulmonary artery hypertension （ n = 5 ）. 345 emboli were detected on axial plane images,320 on MPR,the efficacy of VR and MIP （with 164 and 82 emboli detected respectively） were not as good as that of axial plane （P〈0.05）, especia!.ly in the detection of embolus within and distal to the lobar pulmonary arteries （P＇〈0.05）. Conclusion：PE could be clearly displayed on 16 slice spiral CT;MPR,MIP and VR played an important role and the accuracy of diagnosis could be improved by using these post-processing techniques in combination.
出处
《放射学实践》
北大核心
2009年第3期267-269,共3页
Radiologic Practice
