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. 2020 Oct 1;40(6):1574–1599. doi: 10.1148/rg.2020200149

Figure 2b.

COVID-19 progression over 4 days in a 28-year-old man. (a) Posteroranterior chest radiograph shows bilateral multiple peripheral and lower lobe GGOs (arrows). (b) Axial non–contrast material–enhanced CT image obtained 4 days later shows progression of the typical appearance of COVID pneumonia, manifesting with bilateral GGOs (arrowheads), peripheral on the right and diffuse on the left. In addition, there is rapid worsening of the lung pneumonia, with development of bilateral lower lobe airspace consolidations (arrows).

COVID-19 progression over 4 days in a 28-year-old man. (a) Posteroranterior chest radiograph shows bilateral multiple peripheral and lower lobe GGOs (arrows). (b) Axial non–contrast material–enhanced CT image obtained 4 days later shows progression of the typical appearance of COVID pneumonia, manifesting with bilateral GGOs (arrowheads), peripheral on the right and diffuse on the left. In addition, there is rapid worsening of the lung pneumonia, with development of bilateral lower lobe airspace consolidations (arrows).