输尿管病变的螺旋CT评价

目的探讨螺旋CT各种成像方法在评价输尿管病变中的临床应用价值。方法应用螺旋CT对110例经临床和病理证实的输尿管病变做平扫及四期增强扫描，并作多平面重建(MPR)和三维重建，观察螺旋CT各种成像方法显示和诊断病变的能力，并与其他检查技术及手术病理结果进行比较。结果107例患者螺旋CT轴面结合曲面MPR能很好地显示输尿管病变的部位、大小、形态和分布范围及尿路梗阻的情况，曲面MPR更为直观；81例手术患者，输尿管病变在螺旋CT图像上的表现与手术所见有很好的一致性。三维重建可获得类似于X线尿路造影的图像，能立体显示病变的状况。螺旋CT扫描能很好地弥补其他影像学检查的不足。结论螺旋CT扫描范围大，分辨率高，对输尿管病变的显示和诊断有优越性，尤以曲面MPR价值最大，具有很高的临床应用价值。

Helical CT evaluation of the ureteral diseases

Objective To evaluate the clinical applications of helical CT scans in the ureteral diseases.Methods The precontrast and four-phase postcontrast helical CT scans were performed in 110 patients with ureteral diseases confirmed by clinic and pathology, and the multiplanar reformation (MPR) and three-dimensional reconstruction (3D) images were generated from the volumetric data.The ability of helical CT in detecting and diagnosing the ureteral diseases was investigated.The results were then compared with the findings of the other imaging techniques and surgery.Results Combined with axial and MPR images, the location, size, morphology, extension, and the urinary obstruction of the ureteral diseases could be clearly demonstrated in 97.3% cases, and the curved MPR was useful in directly detecting the lesions.The findings of ureteral lesion on helical CT images corresponded well with that of surgery in 81 cases. 3D reconstruction could produce a three-dimensional image that mimics conventional urography, and was useful in displaying the ureteral lesions from multiple views.Helical CT could compensate for some disadvantages of the other imaging techniques.Conclusion Helical CT, with large scanning area and high resolution, can provide comprehensive information about the ureteral diseases, and the curve MPR has the highest value.