摘要
目的：通过对64层螺旋CT肺动脉造影（CTPA）不同三维重建技术进行分析、对比，寻求一种更有效、简便、直观、快捷的成像方法显示肺栓塞。方法：对24例肺栓塞患者行Siemens Sensation 64层CT肺动脉造影后，应用最大密度投影（MIP）、多平面重建（MPR）、容积显示重建（VRT）技术，选择不同的重建参数，观察三种三维重建方法对肺动脉及其栓子的显示效果，进行比较分析。结果：CTPA不仅可以清晰显示肺动脉主干、叶、段、亚段及5～6级分支，并可显示其内栓子。重建层厚1．0mm、间隔0．5mm及层厚0．6mm、间隔0．4mm重建图像对于肺动脉及其分支血栓的显示无明显差别，MPR图像显示栓子优于MIP、VRT图像，但缺乏立体感，MPR结合MIP、VRT图像更能明确定位及定性诊断肺栓塞。结论：肺栓塞在64层螺旋CT肺动脉造影的三维成像应以MPR为主，MIP及VRT作为辅助方法。
Objective：To explore a more effective, convenient,direct and time saving way to show pulmonary embolism by comparing different 3D-reconstruction techniques of 64 slice CTPA. Methods： 24 patients who suffered pulmonary embolism underwent Siemens Sensation 64 slice CTPA,and then maximal intensity projection （MIP）, multiple planar reconstruction （MPR） and volume rendering technique （VRT） were performed respectively based on different reconstruction parameters. The display of pulmonary arteries and the embolisms was compared and analyzed between the three different reconstruction techniques. Results：CTPA could clearly display not only the pulmonary trunk,lobar, segmental, suhsegmental and Ⅴ-Ⅵ branches, hut also the embolisms in the artery. The reconstruction images showed no obvious difference based on the reconstruction thickness and interval of 1.0 mm and 0.5 mm or that of 0.6 mm and 0.4 mm. MPR images showed superiority to MIP and VRT images in displaying embolisms,but poor stereo manifestation was its disadvantage. MPR,combined with MIP and VRT could help to the accurate diagnosis and display of pulmonary embolism. Conclusions：During 3D reconstruction of 64 slice CTPA in pulmonary embolism, MPR should play the most part,but MIP and VRT can be a useful addition.
出处
《中国冶金工业医学杂志》
2008年第5期525-526,共2页
Chinese Medical Journal of Metallurgical industry
关键词
肺栓塞
CT
动脉造影
三维重建
Pulmonary emholism,CT,Angiography,3D-reconstruetion
