Review of X-ray and computed tomography scan findings with a promising role of point of care ultrasound in COVID-19 pandemic

Table 1 Coronavirus disease 2019 infection staging based on chest computed tomography findings and number of days from the onset of the symptoms

Days (from onset of symptoms)	Stage	Typical findings
0-4	Early	GGO; Distribution: Unilateral/bilateral, lower lobes, peripheral
5-8	Progressive	GGO (diffuse); Crazy paving; Consolidation; Distribution: Bilateral, multilobar
9-13	Peak	Peak CT findings: day 10; GGO (diffuse); Crazy paving; Consolidation (dense); Parenchymal bands
≥ 14	Absorption	CT findings improve from day 14; Absorption of consolidation; GGO present; No crazy paving

GGO: Ground-glass opacities.