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目的对CT尿路造影(CTU)、磁共振尿路成像(MRU)检查技术在泌尿系统结石中的应用价值进行比较。方法76例尿路结石患者(经手术证实)45例实施CTU检查,31例实施MRU检查。CTU采用的重建技术主要包括多层面重组、曲面重建、容积再现和最大密度投影;MRU主要采用最大密度投影。结果经CTU检查的45例患者中有44例结石能够确诊,且图像直观、结石定位准确,确诊率为97.8%;经MRU检查的31例患者明确结石诊断的有20例,确诊率为64.5%,图像能够显示结石部位低信号影及不同程度的梗阻。结论CTU图像质量好,结石检出率高,确诊率可达到97%以上;MRU对结石的图像显示不如CTU,但是作为一种非侵袭性、无需造影剂的检查方法,对结石的诊断也起到十分重要的作用。
Objective To compare the value of CT urography (CTU) and magnetic resonance urography (MRU) in urolithiasis. Methods 76 patients with urolithiasis (confirmed by surgery) were performed CTU in 45 cases and MRU in 31 cases. Reconstruction techniques used by CTU mainly include multi-level reconstruction, surface reconstruction, volume rendering and maximum density projection; MRU mainly adopts maximum density projection. Results Forty-four of the 45 patients diagnosed by CTU were diagnosed correctly. The images were visualized and the stones were accurately located with a diagnosis rate of 97.8%. Twenty patients with definite stones diagnosed by MRU had a definite diagnosis rate of 64.5% , The image can show low signal intensity of the stone site and different degrees of obstruction. Conclusion The CTU image quality is good, the detection rate of stones is high, the diagnosis rate can reach more than 97%; MRU does not show the image of the calculus as CTU, but as a noninvasive and contrast-free examination method, it can also diagnose stones To a very important role.