128层螺旋CT三维重建技术诊断儿童气道阴性异物的价值

目的分析128层螺旋CT三维重建技术在儿童气道阴性异物中的诊断价值。方法36例气道阴性异物患儿螺旋CT薄层扫描后，MPR、MinIP、VR、VE三维重建，分析各自对异物的显示率。结果MPR、MinIP、VE对段以上支气管显示率100％，VR为97％。MPR能直接显示异物部位、大小、形态及与支气管黏膜的关系。MinIP、VR表现为局部气道充盈缺损，连续性中断。VE表现为支气管腔内占位，呈不规则样或完全堵塞。结论128层螺旋CT三维重建技术，可提高支气管异物诊断准确率。

The value of three-dimensional reconstruction techniques with 128-slice spiral CT in detection of tracheobronchial foreign bodies in children

Objective To analyze the value of three-dimensional reconstruction with 128-slice spiral CT in detection of tracheobronehial foreign bodies in children. Methods All 36 children with tracheobronchial foreign body were underwent spiral CT scanning,and then the CT data were reconstructed with Muhi-planar reconstruction（MPR）,minimum intensity projection（MinIP）, volume rendering（VR） and virtual endoscopy（VE）. The diagnostic superiority and shortage to airway foreign bodies in children were retrospectively evaluated among these post-processing techniques. Results The displaying rate of MPR, MinIP and VE for airway above segmental bronchus was 100% ,while that of VR was 97%. MPR could directly reveal the location, size, shape of foreign bodies and the relationship between the foreign bodies and bronchus mucosa. On MinIP and VR, the foreign bodies appeared as filling defect in local airway or interruption of airway column while on VE as irregular or hillocks space occupying. Conclusion Spiral CT post-processing techniques can effectively improve the diagnostic rate of airway foreign bodies in children.