Fig. 2
The dual-energy CT quantitative parameters and immunohistochemical staining in two women with invasive breast cancer. Patient 1 was a 45-year-old woman who was ER- negative, while patient 2 was a 52-year-old woman who was ER-positive. NIC = normalized iodine concentration; nZeff = normalized effective atomic number; λHu = slope of the spectral Hounsfield unit curve; ER = estrogen receptor