Fig. 2From: Nomogram to identify severe coronavirus disease 2019 (COVID-19) based on initial clinical and CT characteristics: a multi-center studyChest CT images of a patient with mild COVID-19. a Axial CT images showed ground-glass opacity (GGO) in the left lower lobe. Vascular bundle thickening (white arrow), air bronchogram sign (black arrow) and crazy-paving sign were observed in the GGO. b Vascular bundle thickening (white arrow) was noted in the GGO of the right lower lobeBack to article page