Fig. 1.

Lesion distribution in the lung fields of critically ill patients with COVID-19. a A 53-year-old male critically ill COVID-19 patient whose symptoms improved and was discharged from the hospital after treatment. CT shows the lesions infiltrating the peripheral and intermediate lung fields, with a lung involvement degree of 26–50% and lesion consolidation degree of 1–25%. b A 77-year-old female critically ill patient with COVID-19 who eventually died. Peripheral, intermediate, and medial areas were seen to be simultaneously involved on CT, with lung involvement and lesion consolidation degrees of 51–75%