16层螺旋CT后处理技术在儿童气管、支气管异物的诊断价值

目的：研究16层螺旋CT三维重建及仿真内窥镜技术对儿童气管、支气管异物的诊断价值。方法：使用螺旋CT对22例怀疑儿童气管、支气管异物的病例行胸部CT平扫,图像重建后传送至工作站处理,使用多平面重建（MPR）及仿真内窥镜技术（CTVB）进行分析,全部病例经纤维支气管镜（FOB）或临床证实。结果：22例中,CTVB显示I～III级气管支气管100%,显示第IV级支气管45.5%;MPR显示I～III级气管支气管100%,显示第IV级支气管50.0%;FOB显示I～II级气管支气管100%,显示第III级支气管72.7%。结论：多层螺旋CT三维重建及仿真内窥镜技术能准确显示气管、支气管异物的位置、大小、形态及阻塞程度,是一种准确、安全的无创性诊断方法,给临床诊断、治疗提供直观的影像学资料,具有较高的诊断价值。

Diagnostic value of multislice spiral (MSCT) after-treatment technology in children's trachea and bronchial foreign body

Objective：To study the diagnostic value of multislice spiral （MSCT） 3D reconstruction and CT virtual bronchoscopy （CTVB） in childi＇en＇s trachea and bronchial foreign body. Methods.. Spiral scans were performed by a MSCT in 22 pediatric chest. The reformed image were transported to a workstation by which 3-D reconstructions were performed with a software named MPR and CTVB were generated. Results .. Bronchi were manifested 100 % in grades I-III, 45.5 % were revealed in grade IV with CTVB, respectively. MPR can display grade I- III, 50. 0%was revealed in grade IV with MPR. CTVB can only enter grade I-III bronchi, only 72.7$ of lobar bronchi can be manifested by FOB. Conclusion 3- D and CTVB in MSCT can accurately show foreign body in trachea and bronchia in terms of l ocation, size, shape and degree of obstruction. It is an accurate and safe noninvasive diagnostic method and can provide image data to clinical diagnosis and therapy. The method has a high diagnostic value.