Figure 4

CT findings of a representative COVID-19 patient in discharge group who presented with fever and mild dyspnea, severe pneumonia, and gradually improved in symptoms corresponding to the CT scans. (A) Scan obtained on illness day 4 shows multifocal ground-glass opacities in double lower lobes, with a subpleural distribution. (B) Scan obtained on illness day 7 shows that the ground-glass opacities were increased, with superimposed interlobular and intralobular septal thickening and with diffuse distribution. (C) Scan obtained on illness day 12 shows that the ground-glass opacities were decreased, with superimposed irregular opacities. (D) Scan obtained on illness day 23 shows development of a mixed pattern.