Fig. 3.

Series CT scans of a representative moderate patient and a critical patient. A The upper row shows a 38-year-old woman with moderate COVID-19 pneumonia and the lower row a 37-year-old woman with critical COVID-19 pneumonia. The lesions of both patients on CT images dramatically decreased from discharge to 12-month follow-up. B Schematic diagram of lesions outlined by AI on CT images. The upper image is the original CT slice and the lower one the AI-based lesion outline. The outlined blue area represents lesions of GGO, and the red area represents lesions of the solid component