16层螺旋CT后处理技术在气管异物检查中的应用

Application of 16-slice spiral CT post-processing in endotracheal non-metallic foreign bodies

目的探讨16层螺旋CT后处理技术在气管及支气管异物检查中的技术方法,评价其应用价值。方法对32例临床疑为气管、支气管异物的患者进行检查。首先进行常规成像,然后进行二维重建技术:多平面重建(MPR)、曲面重建(CMPR);三维重建技术:最小密度投影(M inIp)、容积再现(VR)及三维显示技术:CT仿真内窥镜(CTVE)等技术方法成像。结果 6例未发现异常,26例误吸异物存在于气管、支气管中。其中位于主气管的有4例;位于左主支气管的有8例;位于右侧主支气管的有13例;左、右主气管内均有异物的1例,均获得满意的后重建图像。后重建图像实现单独或联合显示气管、支气管树等结构,并任意切割、旋转及三维解剖测量,较常规图像清楚、直观,显示解剖、异物位置全面、准确。以上病例均行纤维支气管镜检查或临床证实。结论 16层螺旋CT扫描及多种后处理技术的运用是气管、支气管异物准确诊断的技术方法,它无创伤,定位准,简便易行。后重建图像处理技术能很好显示气管、支气管树结构及异物的位置关系,为影像诊断及临床制定科学的方案提供可靠的解剖依据。

Objective To evaluate the application value of 16-slice spiral CT post-processing techniques in the trachea and bronchial foreign bodies in the technical inspection methods.Methods Totally 32 cases of suspected tracheobronchial foreign body were examined.First general imaging,and then make a two-dimensional reconstruction： MPR（MPR）,surface reconstruction（CMPR） and three-dimensional reconstruction： minimum density projection（MinIp）,volume rendering（VR） and three-dimensional display technology： CT virtual endoscopy（CTVE） technology for imaging.Results No abnormal results in 6 cases,26 cases of foreign body aspiration exists in the trachea,bronchus.Which is located in the main trachea in 4 cases,in the left main bronchus in 8 patients,in the right main bronchus in 13 patients,left and right are the main tracheal foreign body in 1 case,were satisfactory reconstruction image.Reconstructed image after the show alone or in combination to achieve the trachea,bronchial tree and other structure,and any cut,rotate and three-dimensional anatomical measurements,compared with conventional images clear,intuitive,shows anatomy,foreign location comprehensive and accurate.These patients underwent fiberoptic bronchoscopy or clinical trials.Conclusions 16-slice spiral CT scanning and the use of a variety of post-processing technology is the trachea,bronchus and accurate diagnosis of the technical methods,it is non-invasive,accurate positioning,simple and easy.Reconstruction image processing technology can show the trachea,bronchial tree and the location of foreign relations for the imaging diagnosis and clinical development of a scientific program to provide a reliable anatomical basis.