Fig. 1

Typical CT imaging findings of a 67-year-old man with persistent pulmonary fibrosis. A Thin-section chest CT scan in our hospital on January 26, 2020 (9 days after symptoms onset). Chest CT imaging showed diffuse ground-glass opacities in both lungs, and a visible parenchymal band in the lower lobe of left lung (red arrow). B On March 23, 2020 (66 days after symptoms onset), diffuse ground-glass opacities were resolved partially in both lungs and new consolidation was observed. Irregular interfaces (black arrows) with a small amount of pleural effusion were observed in the lower lobes of both lungs. C On April 21, 2020 (95 days after symptoms onset), parenchymal bands and traction bronchiectasis were observed (red arrow). D On Jun 15, 2020 (150 days after symptoms onset), parenchymal bands and traction bronchiectasis were still observed in left lower lungs