Fig. 1
The dual-energy CT quantitative parameters and immunohistochemical staining in two women with invasive breast cancer. Patient 1 was a 50-year-old woman who was PR- negative, while patient 2 was a 47-year-old woman who was PR-positive. NIC = normalized iodine concentration; nZeff = normalized effective atomic number; λHu = slope of the spectral Hounsfield unit curve; PR = progesterone receptor