肺栓塞在16排螺旋CT血管成像

目的：对13例肺栓塞患者的16排螺旋CT各种血管成像进行分析、对比，寻求一种更有效、简便、直观、快捷的成像方法显示肺栓塞。方法：经血管造影（CTPA）后，应用最大密度投影（MIP）、多平面重建（MPR）、容积显示重建（VRT）及仿真内窥镜（VE）成像技术，对于栓塞部位不同者选择不同的层厚（SL）进行图像重建处理。结果：VRT成像对显示肺动脉主干部位的栓塞最为直观，依次为MIP、MPR及VE图像，其中MIP、MPR成像对显示肺叶以下动脉小栓塞情况较好。结论：肺栓塞在16排螺旋CT血管造影后的成像中应以MIP、MPR为主，VRT及VE成像作为一辅助方法。

The technique analysis of 16-detector multi-slice spiral CT angiography in evaluating pulmonary embolism

Objective:To analyze the images of l6-detector multi-slice spiral CT angiography in 13 pulmonary embolism patients in order to find a kind of more valid,easy,fast and simple way to display pulmonary embolism.Methods: Multi-planar reformation(MPR),maximum intensity projection(MIP),volume rendering technique(VT) and virtual endoscopy(VE) were used in the primary imagines of 13 patients who were examined by 16-slices spiral CT pulmonary angiography.The source images were reconstructed in different slices according to the part of pulmonary embolism.Results: VRT was the best way to display the mainly body of the pulmonary artery embolism.The next better one were MIP,MPR and the VE in order.MIP and MPR well displayed the small pulmonary artery embolism which below the lobe of lung.Conclusion: MIP and MPR should take as a lord in diagnosis of pulmonary embolism,VRT and VE will be the assistance methods.