DR及MSCT对气道透X线异物的诊断价值

摘要

Objective:To study the value of digital radiography (DR)and multi-slice spiral computerized tomography (MSCT)of chest in detecting intra-tracheobronchial radiolucent foreign body.Methods:Pre- and postoperative DR and MSCT of chest in 93 patients with intra-tracheobronchial radiolucent foreign body were reviewed and analyzed,All patients were confirmed by foreign body extraction via bronchofiberscopy.Direct,indirect imaging findings and localization of intra-tracheobronchial radiolucent foreign body before and after operation were studied and compared.Results:Of the 93 patients, direct sign of intra-tracheobronchial radiolucent foreign body was assessed in 82 patients (88.17%)of chest DR before op-eration;which was assessed in 93 patients (100%)with preoperative MSCT.However,there was no obvious difference in detecting the indirect sign with these two modalities.For the ability of localization of foreign body,91 out of 93 patients were found and localized by preoperative chest DR,and 93 out of 93 patients were found and localized by preoperative MSCT.Conclusion:The direct sign of intra-tracheobronchial radiolucent foreign body can be revealed by chest DR in most of the patients,which is much superior to conventional chest radiography,and have a high application value in the diagnosis and localization of intra-tracheobronchial transluscent foreign body.However,MSCT has obvious advantage in the diagnosis of intra-tracheobronchial radiolucent foreign body.%目的：探讨胸部 DR 及 MSCT 对气道透 X 线异物的诊断价值。方法：回顾性分析经术前胸部 DR、MSCT 诊断并经纤维支气管镜取异物术后证实，并有术后胸部 DR 复查的93例气道透 X 线异物病例的临床及影像学资料，将术前胸部 DR 与术后 DR、术前 MSCT 进行对照，比较术前胸部 DR、MSCT 显示透 X 线异物的直接、间接征象和异物定位情况。结果：93例中术前胸部 DR 有82例显示了透 X 线异物的直接征象，阳性征象显示率为88．17％；术前 MSCT 93例均显示了透 X 线异物的直接征象，阳性征象显示率为100％。显示异物的间接征象方面两种检查方法无明显差异。术前胸部 DR 提示异物存在及定位的有91例，术前 MSCT 提示异物存在及定位的有93例。结论：胸部 DR 能显示绝大部分透 X线异物的直接征象，填补了传统胸部 X 线检查不能显示异物直接征象的空白，在诊断透 X 线支气管异物以及异物定位方面均有较高的应用价值。在诊断气管透 X 线异物方面，MSCT 有明显优势。