Lu J, Pi S, Ma FH, et al. - In this retrospective analysis, researchers compared normalized apparent diffusion coefficients (nADCs) of different references with ADCs at different b factors with respect to diagnostic performance for distinguishing borderline epithelial ovarian tumors (BEOTs) from malignant epithelial ovarian tumors (MEOTs). A total of 53 BEOTs and 148 MEOTs were included. Findings revealed the capability of both ADC_tumor and nADCs for distinguishing BEOTs from MEOTs. Among all nADCs, nADC_urine was the best. Furthermore, the superiority of nADC_urine over ADC_tumor was indicated by its stable performance in distinguishing BEOTs from MEOTs, irrespective of b factors.