MSCT后处理重建技术在肾移植后肺部感染中的应用

Application of MSCT post-processing techniques in pulmonary infections after kidney transplantation

目的探讨MSCT后处理重建技术在肾移植后肺部感染诊断中的应用价值。方法回顾性分析52例临床证实的肾移植后肺部感染患者的常规CT、HRCT以及后处理重建图像资料(MPR、MIP、MinIP、VR)胸部CT征象的显示及分布。结果39例患者明确病原体,其中以混合感染(18/52)最多,细菌感染(13/52)次之,真菌(4/52)与CMV感染(4/52)较少。后处理重建图像的小结节显示率明显高于常规CT、HRCT(P均<0.05),对于其他征象的显示差异无统计学意义(P均>0.05),但有助于病灶范围显示。结论MSCT各种后处理重建有助于显示肾移植后肺部感染所致实质、气管、血管改变;增强后血管重建有助于曲霉菌早期诊断。

Objective To explore the value of MSCT post-processing techniques in the assessment of pulmonary infections after kidney transplantation. Methods A total of 52 consecutive kidney transplantation recipients had clinically confirmed pulmonary infection. Data of routine CT, HRCT and post-processing images with MPR, MIP, MinIP, VR technique were analyzed retrospectively. Results A total of 39 patients were diagnosed, and 18 of them had mixed infection, 13 had bacteria infection, the rest had fungi （n=4） and eytomegalo virus （n= 4） infection. The nodules were better displayed in the postprossing images than in the routine CT and HRCT images （all P〈0.05）. Although there was no difference of other manifestations （all P〉0. 05）, post-processing images were helpful to show the range of pulmonary infiltration. Conclusion Post-processing techniques, including MPR, MIP, MinIP and VR, are helpful to display the changes of parenchyma, trachea and vessels in pulmonary infections after kidney transplantation. MSCT angiography after enhancement contributes to the early diagnosis of pulmonary aspergillin.