MKI67 and ovarian serous adenocarcinoma: For example, in their comparison of the performance of 18F-FDG PET/CT whole tumor region radiomics with habitat-derived radiomics in determining Ki-67 expression in case of high-grade serous ovarian cancer, Wang et al. found that the habitat-based method was significantly better than the whole tumor region radiomics analysis (Delong test, P < 0.05) [26].