Figure 2.

Box-and-whisker plots presenting the distributions of NIC, λ_Hu, nZ_eff, and attenuation in the arterial and venous phases between benign (n=44) and malignant (n=117) lesions of the breast, respectively. Continuous data were compared using the Welch’s t-test for normal distributions and using the Mann-Whitney U-test for non-normal distributions. NIC, normalized iodine concentration; nZ_eff, normalized effective atomic number; λ_Hu, slope of the spectral Hounsfield unit curve; HU, Hounsfield unit.