Objective To remedy the defect in ureter segmentation development in computed tomography urography (CTU) by using 3D image fusion technology to carry on the infusion of CTU images of different phases.Methods 3D CT image infusion technology was applied to the urographic images of 46 patients who underwent conventional CTU scan, integrity of ureter segmentation development before and after infusion was compared, two physicians evaluated the practical significance and diagnostic value of the infused images.Results As indicated by the results of image infusion in the 46 cases, 43 cases could show the full view of ureters, which solved the problem of incomplete display in CTU images of different phases;41 cases were diagnosed as positive; 4 cases were diagnosed as negative; 1 case was of unclear diagnosis and needed a retrograde urography examination for further diagnosis.Conclusion The application of 3 D CT image infusion technology could produce high-quality overall CTU images, which allowed physicians to observe pathological changes comprehensively from multiple perspectives and was of certain signiifcance in increasing the rate of diagnostic accuracy of related pathology.%目的：通过CT三维图像融合技术，将CT输尿管造影（CTU）分期图像进行融合，以弥补CTU图像上输尿管分段显影的缺陷。方法对46例行常规CTU扫描的患者的图像进行三维图像融合后处理，对比处理前后图像上输尿管显影的完整性，由两位诊断医师评价融合后图像的实际意义及对诊断的帮助。结果46例患者的融合后图像结果显示，有43例图像可显示输尿管全貌，很好地解决了CTU各期图像上输尿管显示不全的问题；有41例诊断阳性，4例诊断阴性，1例诊断不清，需借助逆行尿路造影检查进行诊断。结论使用CT三维图像融合技术能够同机融合出高质量的CTU输尿管整体影像，便于诊断医师全面、多角度地观察病变，对提高相关病变的诊断准确率具有一定价值。
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