Fig. 2.

57-year-old man with COVID-19 (a, b) and 58-year-old man non-COVID-19 (c, d). Axial unenhanced quantified Chest CT scans that show diffuse bilateral ground-glass opacities (GGOs) and some fibrotic alterations in COVID-19 patient (a, b) and rare ground-glass opacities in non-COVID-19 patient (c, d). Chest CT semi-automatic quantification shows GGOs in red, vessels in yellow and fibrotic alterations in blue, these findings are more represented in COVID-19 patient (a) then in non-COVID-19 patient (c)