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目的评价双源CT双能量肺动脉成像技术在肺动脉栓塞诊断中的作用。方法对我院2006年9月至2009年11月接收疑为肺动脉梗塞的25例患者进行DSCT诊断,获得140 kV、80 kV及两者融合的3组横断面原始图像,将140 kV和80 kV两组图像输入双能量后处理软件(DE),获得DE灌注图像(DEPI);将融合图像输入三维软件获得血管MPR图像(V2MPR),综合DEPI与V2MPR直接显示栓子,由2位资深医师对V2MPR图像质量进行肉眼观察评价。结果 25例患者DSCT双能量肺动脉血管V2MPR图像显示有区别,肺动脉、栓子、图像整体观显示不同,13例具有明显的低灌注区;DEPI中肺动脉干、叶动脉及部分段肺动脉内栓子均引起低灌注区,其余段及亚段肺动脉内栓子未见明显灌注改变。结论 DSCT双能量肺动脉成像能对肺动脉栓塞进行早期诊断,具有一定的优点,值得在临床推广。
Objective To evaluate the role of dual-source CT dual-energy pulmonary arteriography in the diagnosis of pulmonary embolism. Methods Twenty-five patients with suspected pulmonary artery infarction from September 2006 to November 2009 in our hospital were diagnosed by DSCT. Three groups of cross-sectional images of 140 kV and 80 kV were obtained, and the images of 140 kV and 80 kV Two sets of images were input to dual-energy post-processing software (DE) to obtain DE perfusion image (DEPI). The fused images were input to three-dimensional software to obtain vascular MPR images (V2MPR). DEPI and V2MPR were combined directly to display emboli. The V2MPR image quality was visually evaluated. Results The results of V2MPR images of DSCT dual-energy pulmonary arteries were different in 25 patients. Pulmonary arteries, emboli and the whole image of the pulmonary embolism showed different manifestations. Thirteen patients had obvious hypoperfusion area. Pulmonary artery, leaf arteries and partial pulmonary embolism in DEPI Cause low perfusion area, the remaining segments and sub-pulmonary emboli no significant perfusion change. Conclusion DSCT dual-energy pulmonary arteriography can diagnose pulmonary embolism early, which has some advantages and is worthy of clinical application.