256层iCT肺动脉造影对肺动脉栓塞的诊断价值

The diagnostic value of 256 slice iCT pulmonary angiography in pulmonary embolism

目的探讨256层i CT增强扫描在肺动脉栓塞影像诊断中的价值。方法回顾性分析29例肺动脉栓塞患者临床资料,并分析其CT影像特征,所有病例均行256层i CT扫描并行多平面重组(MPR)、曲面重组(CPR)、三维容积成像(VR)及最大密度投影(MIP)等后处理,对血栓的形态、部位、影像特点进行归类分析。结果 29例均能显示肺栓塞的部位及范围,CT表现为:中心性充盈缺损、偏心性或附壁性充盈缺损、部分阻塞性充盈缺损(部分血管截断征),部分患者可见肺梗死、肺体积缩小、胸腔积液、膈肌抬高等肺动脉栓塞的间接征象。结论 256层i CT增强扫描是一种安全、快捷、有效的诊断肺栓塞的无创性检查手段,其检出率高,可作为肺栓塞的首选检查方法。

Objective To assess the clinical significance of 256-slice CT angiography in the pulmonary embolism during dynamic contrast-enhanced CT examination. Methods 29 patients with clinically known PE underwent MSCTA,by mutiplanar reconstruction（ MPR）,Curved planar reformation（ CPR）,3D volume imaging（ VR） and maximum intensity projection（ MIP） after treatment,and contemporary analysis of characteristics of morphology,location image of thrombosis. Results MSCTA clearly showed the sites,extensions and stenosed lumens of PE in all patients on CTA images. PE lesions apeared as intraluminal irregular-plaque shape and adhered-mural filling defects whose periphery was probably encased by the contrast medium with hyperdensity. Conclusion 256-slice spiral CT angiography is one of the most effective and non-invasive imaging modalities in the diagnosis of pulmonary embolism.