双能量能谱CT分析体内尿酸结石的诊断价值

回顾性分析行双能量能谱CT扫描的57例尿路结石患者,采用有效原子序数及直方图判断结石成份.以红外光谱分析结果作为参照标准,双能量能谱CT分析体内纯尿酸结石、纯非尿酸结石、混合结石得到灵敏度100%、91.7%、97.0%,特异度100%、97.4%、95.7%,阳性预测值100%、84.6%、98.5%以及阴性预测值100%、98.7%、91.7%.双能量能谱CT通过有效原子序数结合直方图诊断体内纯尿酸结石、纯非尿酸结石、混合结石准确性高,可准确区分尿酸及非尿酸结石.

Diagnostic value of dual energy spectrum CT in uric acid calculus

57 cases of patients were treated with dual energy spectral CT scanning in a retrospective study and the effective atomic number and histogram were adopted to determine the stone composition.The results of infrared spectroscopy were used as reference standards.The sensitivity for detecting pure uric stones,pure non-uric acid stones and mixed stones were 100%,91.7%,97.0%,respectively;with specific degree 100%,97.4%,95.7%,respectively;with positive predictive value 100%,84.6%,98.5%,respectively;and the negative predictive value were 100%,98.7%,91.7%,respectively. Dual energy spectrum CT through effective atomic number combining histogram has high accuracy in the diagnosis of pure uric acid stones, pure non-uric acid stones and mixed stones and can accurately distinguish uric acid stones and non-uric acid stones in vivo.