双能量CT肺灌注成像诊断肺栓塞

发布时间：2018-04-01 14:28

本文选题：双能量CT　切入点：肺灌注　出处：《中国医学计算机成像杂志》2015年03期

【摘要】：目的:探讨肺栓塞(PE)的双能量CT肺灌注成像(DEPI)表现及其诊断价值。方法:42例疑似PE患者进行DEPI扫描,以80k V的数据得到CTPA图像,采用Lung PBV软件后处理得到DEPI图像,观察CTPA图像上PE的位置、类型以及DEPI图像肺灌注缺损的位置及形态,以肺段为单位对PE的类型及灌注缺损的类型进行相关性分析,以CTPA为标准分析以肺叶及肺段为单位DEPI诊断PE的效率。结果:840个肺段中CTPA检出178个肺段有PE,DEPI检出186个肺段有灌注缺损,部分型PE主要为斑点状、斑片状灌注缺损或无缺损,完全型PE则以段或亚段分布的灌注缺损为主,且栓塞与灌注缺损类型存在相关性(P0.05)。以CTPA为标准,以肺叶及肺段为单位DEPI诊断PE的敏感度、特异度、KAPPA系数值分别为89.06%、73.97%、0.555,79.77%、93.35%、0.719。结论:DEPI可以一次扫描获得肺组织的解剖与功能信息,有助于PE的诊断。
[Abstract]:Objective: to investigate the features and diagnostic value of dual-energy CT perfusion imaging (DEPI) of PE in PE. Methods: 42 suspected PE patients were scanned by DEPI, CTPA images were obtained by 80 kV data, and DEPI images were obtained by post-processing with Lung PBV software. The location and type of PE on CTPA images and the location and morphology of pulmonary perfusion defects in DEPI images were observed. Using CTPA as standard, the efficiency of diagnosing PE with lobar and segmental DEPI was analyzed. Results 178 segments of lung were detected by CTPA, 186 segments of PE were found to have perfusion defects, and some types of PE were mainly speckled, patchy or not. The type of complete PE was mainly segmental or subsegmental perfusion defect, and there was a correlation between the type of embolization and perfusion defect (P 0.05). The sensitivity of PE was determined by using CTPA as standard and pulmonary lobe and lung segment as unit DEPI. The specificity and KAPPA coefficient were 89.06, 73.97 and 0.5557.Conclusion the lung anatomy and function information of lung tissue can be obtained by one scan, which is helpful for the diagnosis of PE. [WT5 "HZ] [WT5" HZ] [WT5 "HZ] [WT5" HZ] [WT5 "HZ] [WT5" HZ] [WT5BZ]
【作者单位】：四川省医学科学院四川省人民医院;
【分类号】：R563.5;R816.41

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