摘要
目的:前瞻性研究双源双能量CT能否准确区分体内尿酸和非尿酸结石,以及在非尿酸结石中区分草酸钙和非草酸钙结石。方法:纳入67例患者的81枚结石,以红外光谱分析结果作为结石成分的参考标准,计算双源双能量CT区分体内尿酸结石及在非尿酸结石中区分草酸钙结石的诊断效能。结果:双能量CT分析结果为7枚尿酸结石和74枚非尿酸结石,74枚非尿酸结石中包括66枚草酸钙结石和8枚非草酸钙结石。双能量CT鉴别尿酸结石以及在非尿酸结石中鉴别草酸钙结石的敏感度、特异度、阳性预测值、阴性预测值和准确度分别为77.8%、100%、100%、97.3%、97.5%和100%、80%、97.0%、100%、97.3%。结论:双源双能量CT能准确区分体内尿酸和非尿酸结石,并能进一步在非尿酸结石中准确区分草酸钙和非草酸钙结石。
Objective：To prospectively evaluate whether dual-source dual-energy CT （DSDECT） could accurately differentiate uric acid stones from non-uric acid stone and distinguish calcium oxalate stone from non-uric acid stone in vivo. Methods：81 urinary stones in 67 patients were included in this study. Reference standard of stone composition was made by Fourier transform infrared spectroscopy （FT-IR）. Diagnostic performance of DSDECT for determining uric acid stone and calcium oxalate stone were evaluated. Results. According to the result demonstrated on DSDECT analysis, 7 uric acid stones and 74 non-uric acid stones were found,among which,66 were calcium oxalate stone and 8 were non-calcium oxalate stone. The sensitivity, specificity, positive predictive value, negative predicted value and accuracy of DSDECT for differentiating uric acid stone and determining calcium oxalate stone among non-uric acid stones were 77.8%.100%.100%.97.3% .97.5% and 100%.80%.97.0% .100%. 97.3%,respectively. Conclusions：DSDECT could accurately differentiate uric acid stone from non-uric acid stone and distinguish calcium oxalate stone from non-uric acid stone in vivo.
出处
《放射学实践》
北大核心
2018年第1期55-59,共5页
Radiologic Practice
