Fig. 1

Representative images of SARS-CoV-2 pneumonia. A and B indicate two representative CT images of the nonsevere and severe cases, respectively. C and D are corresponding images after segmentation of lungs, ground-glass opacification/opacity (GGO) and consolidation (CON). The blue and pink colored areas indicate the area of GGO and CON respectively. In the nonsevere case (A, C), the percentages of whole, peripheral, and central lungs occupied by GGO (GGO%, GGO%(P), GGO%(C)) were 5.61%, 11.0%, and 2.22%, respectively. The percentage of whole, peripheral, and central lungs occupied by CON (CON%, CON%(P), CON%(C)) were 5.37%, 3.54%, and 6.52%, respectively. In the severe case (B, D), GGO%, GGO%(P), GGO%(C) were 9.68%, 10.8%, 8.31%, and CON%, CON%(P), CON%(C) were 12.1%, 15.0%, 8.70%