Figure 2.

A 65-year-old woman with adenocarcinoma in AP (late-arterial phase) (A,B) and VP (venous phase) (C,D). Monochromatic 70 keV _SSDECT (single source Dual Energy Computed Tomography) images show a hyperattenuating solitary pulmonary nodule(SPN) in the right lung (blue regions of interest (ROI)) (A,C). The graphs show DECT spectral attenuation curves for the enhancing mass SPN (blue) and descending aorta (red) (B,D). An increasing curve slope is visible at lower energies, which is related to the interaction of iodine atoms with photons at these energy levels based on the photoelectric effect. Attenuation of SPN mean: (AP) = 84.85 HU, (VP) = 54.51 HU.