多层螺旋CT后处理技术对小儿气管、支气管异物的诊断价值

摘要

目的：探讨多层螺旋CT图像后处理技术在小儿气管、支气管异物诊断中的应用价值。方法通过对我院25例疑似支气管异物的患儿行多层螺旋CT扫描，采用MPR、Min IP、VR及VE等后处理技术，分析并比较其在气管、支气管异物中的诊断价值。结果经临床纤维支气管镜证实为气管、支气管异物的25例患儿均获得清晰的CT图像及后处理图像，多平面重建(MPR)对异物显示较佳，显示率为100%(25/25)，容积再现(VR)能明确异物的位置及与气管的关系，显示率为97%(24/25)，最小密度投影(Min IP)对异物的测量较精确，显示率为97%(24/25)，及仿真内窥镜(VE)能准确显示异物在气管内的位置及对气管的堵塞情况。结论 MSCT后处理技术在小儿气管、支气管异物诊断中准确率较高，可成为首选的影像学检查方法。%Objective To explore the application value of multi-slice spiral CT (MSCT) image post-process-ing technique in the diagnosis of tracheal and bronchus foreign body in children. Methods Twenty-five children sus-pected with bronchial foreign bodies in our hospital were scanned by multi-slice spiral CT. Then the imaging data were processed by techniques of multi planar reconstruction (MPR), minimum intensity projection (Min IP), volume rendering (VR) and virtual endoscopy (VE). The diagnosis value of the techniques for trachea, bronchial foreign body was analyzed and compared. Results The 25 cases all obtained clear CT images and post-processed images. MPR displayed the foreign body best, with the display rate of 100%(25/25). VR could clear display foreign body and its re-lationship with the trachea, with the display rate of 97%(24/25). Min IP was good at distinguish the accurate measure-ment of the foreign body, and the display rate was 97%(24/25). VE could show the foreign bodies in the trachea of the position and the blockage of the trachea accurately. Conclusion The MSCT image post-processing techniques have great precision in the diagnosis of trachea, bronchus foreign body, which, consequently, would become the first choice for imaging examination.