Dual-detector Spectral CT In Differentiating Lipid-poor Adrenal Adenomas From Metastases Initial Research

Objective:Exploring different ke V virtual single-energy imaging and energy spectral attenuation in dual-detector spectral CT(SDCT)unenhanced scanning differential diagnosis of lipid-poor adrenal adenoma and metastases by curve and effective atomic number.Methods:Retrospective analysis of patients undergoing dual-detector spectral CT scans in our hospital from March 2020 to September 2021 all cases underwent CT scan,including fat-poor adrenal adenoma.Physical examination confirmed that,for example,adrenal metastases were confirmed by pathology or follow-up of 6 months or more.Through post-processing the workstation obtains the mixed-energy CT value of the lesion area of interest,the virtual single-energy 40-140 ke V CT value,and the energy spectrum curve slope K value and effective atomic number value.After statistical analysis,the differences and different indicators of the data of each group were compared,target diagnostic performance.Results:The CT value and Z value of 40-90 Ke V single energy in the metastatic tumor group were higher than those in the lipid-poor adrenal adenoma group(P<0.05),while the CT values of conventional 120 k Vp mixed energy and 100～140ke V single energy had no significant difference(P>0.05).There were differences in the slope of the energy spectrum curve between the two groups(P<0.05).ROC curve results show: single energy40 ke V levels of CT value of area under curve(AUC),the largest is 0.989,the slope K value,effective atomic number.Conclusion:Dual-detector spectral CT has a certain application value in the identification of lipid-poor adrenal adenomas and metastases.