螺旋CT对气管支气管异物和狭窄的诊断价值

目的：探讨螺旋CT（MSCT）对气管、支气管异物和狭窄的诊断价值。方法：对18例可疑支气管异物的患儿进行MSCT检查。将获得的轴位扫描图像行Minp及MPR重建，并与支气管镜检查结果对照。结果：MSCT显示异物15例，21枚，其中1例异物CT值为278HU，其余14例CT值为-10．6～31．0HU；位于主支气管6例，叶支气管9例，其中并发段支气管异物4例。支气管炎性狭窄2例，异物取出后气道狭窄1例。异物及气管狭窄的显示以MPR和Minp图像最好。支气管镜所见与MSCT一致，但4例并发段支气管异物者未发现。MSCT所见不仅与支气管镜吻合，而且可准确显示段支气管以下的异物。结论：MSCT可准确显示气管、支气管异物与狭窄的直接和间接征象，并较准确地判定异物性质，对小儿支气管异物的诊断有重要参考价值。

MSCT diagnostic value to foreign body and stenosis in trachea and bronchus of children

Objective:To evaluate MSCT diagnostic value in children with foreign body and stenosis in trachea and bronchus.Materials and.Method:MSCT scan was done in 18 children suspected foreign body and stenosis in trachea and bronchus. Postprocesses(included Minp and MPR)were done after the axial images were obtained. All of 18 cases underwent conventional BFS.Result:Fifteen cases were shown with foreign body through MSCT scan. In addition, total amount of foreign body reached 21 pieces; The CT value in one case was 278 HU,in the others were from -10.6 HU to 31 HU;Stenosis in trachea and bronchus was found in 2 cases; Stenosis in laryngeal cavity after foreign body removing in one case.Foreign body and stenosis in trachea and bronchus were shown better in MPR and Minp images.MSCT images were not only conformed to BFS completely, but also showing foreign body in segmental bronchus more accurately.Conclusion:MSCT sacning could show direct and indirect signs of the foreign body and stenosis in trachea and bronchus accurately,and determine the nature of foreign body.It can act as a primary examination.