能谱CT多参数成像在阴性胆囊结石诊断中的应用价值OA

Objective To explore the value of spectral CT's single-energy imaging,spectral curve,and atomic number in the diagnosis of negative gallbladder stones.Methods Imaging data of 76 patients with suspected negative gallbladder stones were retrospectively collected,and all patients underwent cholecystectomy,with surgical results as the reference standard.Differences in 40 keV single-energy images,spectral curve slopes,and effective atomic numbers between negative gallbladder stones and bile were compared.The diagnostic efficacy of 40 keV single-energy images,spectral curves,and effective atomic numbers for distinguishing negative gallbladder stones from bile was analyzed using receiver operating characteristic(ROC)curves.Results At 40 keV,the effective atomic number of negative gallbladder stones was 6.12±0.37,while that of bile was 7.45±0.41,with a statistically significant difference(P<0.05).The CT value of negative gallbladder stones was(-40.12±12.67)HU,and that of bile was(5.78±14.89)HU,showing a statistically significant difference(P<0.05).The spectral curve slope of negative gallbladder stones was-1.58±0.39,compared with 0.27±0.12 for bile,with a statistically significant difference(P<0.05).ROC curve analysis showed that the areas under the curve of 40 keV single-energy images,spectral curves,and atomic number maps were 0.940,0.951,and 0.974,respectively,with sensitivities and specificities of 88.89%and 84.21%,92.31%and 91.12%,100%and 96.11%.Conclusion Spectral CT multiparametric imaging is helpful for early detection of gallbladder stones,guides clinical treatment decisions,reduces the risk of misdiagnosis and missed diagnosis,and has a positive impact on patient treatment and prognosis.