螺旋CT肺动脉造影诊断肺栓塞的临床应用研究

目的评价螺旋CT肺动脉造影(sp iral CT pu lmonary angiography,SCTPA)诊断肺栓塞的临床价值及其限度。方法52例肺栓塞均行SCTPA检查。SCTPA扫描时间为0.8 s,扫描层厚3 mm,螺距1.5~2.0,重建层厚1 mm,重建方法包括M IP、MPR和SSD。结果统计52例肺栓塞的2898支血管,其中927支血管SCTPA检出肺栓塞直接征象,约占32.0%;1302支段以上肺动脉中,728支显示肺栓塞的直接征象;1896支亚段肺动脉中,199支显示直接征象。平扫显示间接征象共113例次。结论SCTPA是一种高效、无创性的肺栓塞检查方法,对段以上肺栓塞不仅可做准确的定性诊断,而且可定量分析,但对亚段以下肺栓塞的诊断受限。

Clinical Evaluation of Spiral CT Pulmonary Angiography in the Diagnosis of Pulmonary Embolism

Objective To evaluate the clinical application of spiral CT pulmonary angiography(SCTPA) in the diagnosis of pulmonary embolism(PE) and its limitation.Methods 52 cases of PE were analyzed.SCTPA were performed in all cases with slice thickness 3 mm,pitch 1.5~2.0,scanning time 0.8 s,reconstruction thickness 1mm.The reconstructions of SCTPA included MIP,MPR and SSD.Results 2898 pulmonary arteries in 52 cases were observed.The direct manifestations of PE were showed in 927 pulmonary arteries(32.0%) by SCTPA,in which superior segmental and inferior segmental of pulmonary arteries were involved respectively.The indirect manifestations of PE were showed by plain scan in 113 cases.Conclusion SCTPA is a high effective and noninvasive method in the diagnosis of PE especially for the PE of superior segmental.