Comparison Of Diagnostic Efficacy Between Digital Breast Tomosynthesis And Magnetic Resonance Imaging In Breast Cancer

Objective:To compare the diagnostic efficacy of digital breast tomosynthesis(DBT)and 3.0T magnetic resonance imaging(MRI)for breast cancer in different types of breast background,so as to guide the selection of the best examination method for clinically suspected breast cancer patients.Method:In this study,a retrospective statistical analysis method was used to study 298 patients who met the inclusion criteria for examination in the imaging department of our hospital from January 2019 to June 2020.All patients included in the study received DBT and MRI examination,and two senior imaging physicians performed DBT and MRI diagnostic analysis.According to the breast types(fatty type,scattered fibroglandular type,heterogeneous dense type and dense type),the breast was divided into four groups.With the pathological results as the gold standard,the diagnostic value of DBT and MR was compared by the chi-square test,and the P value was calculated and compared to see if there was statistical significance in the diagnostic difference between the two,and then the analysis was carried out by SPSS26.0 software.Receiver operating characteristic curve(ROC curve)was drawn and the area under the curve was calculated.The sensitivity,specificity,positive predictive value and negative predictive value of the two imaging tests in the diagnosis of breast cancer were calculated and compared.Results:The sensitivity,specificity,positive predictive value and negative predictive value of DBT and MRI in the diagnosis of breast cancer were 84.6%and 91.7%,90.2%and 89.3%,respectively,and 94.2%,94.2%and 85.1%,respectively.The sensitivity,specificity,positive predictive value and negative predictive value of DBT and MRI were 85.7%,97.9%,91.3%,86.9%,95.4%,94.1%,and 75.0%,95.2%,respectively in the diagnosis of breast cancer in fatty breast.The sensitivity,specificity,positive predictive value and negative predictive value of DBT and MRI in the diagnosis of scattered fibroglandular breast cancer were 95.1%and 80.4%,94.7%,94.7%,97.5%and 97.0%,respectively.The sensitivity,specificity,positive predictive value and negative predictive value of DBT and MRI in the diagnosis of non-uniform dense breast cancer were 78.5%,91.4%,88.5%,93.2%,94.1%and 67.3%,83.7%,respectively.The sensitivity of DBT and MRI in the diagnosis of breast cancer in dense breast were 82.8%and 97.1%,the specificity was 88.4%and 88.4%,the positive predictive value was 90.6%and 91.8%,the negative predictive value was 79.3%and 95.8%,respectively.Conclusion:1.3.0T-MRI is better than DBT in the diagnosis of breast cancer without distinguishing breast types;2.3.0T-MRI was better than DBT in the diagnosis of breast cancer in fatty,heterogeneous and dense breast types,but DBT was better than 3.0T-MRI in the diagnosis of breast cancer in scattered fibroadenoid breast types,which may be related to the higher DBT in the diagnosis of microcalcification.3.DBT combined with MRI can improve the diagnostic efficiency of breast cancer in fatty,heterogeneous dense and dense breast types.DBT combined with MRI can improve the diagnostic efficiency in scattered fibroglandular breast types compared with MRI,but it does not significantly improve the diagnostic efficiency of breast cancer compared with DBT.