Table 3.

Differentiating coronavirus disease 2019 from other infections based on the chest computed tomography pattern

COVID-19	Other viral pneumonias	Bacterial/mycoplasma and chlamydial pneumonias
Early stage: Peripheral pure GGO	Interstitial inflammation	Bronchial pneumonia, lobar pneumonia
Progressive stage: Peripheral multiple GGOs, consolidation, crazy-paving pattern, peripheral vascular “tree-in-bud” pattern	Hyperdense reticular patterns or multiple high-density fibrous streaks	Bronchial wall thickening
Advanced stage: Extensive exudative lesions, lung “whiteout”, fibrosis	Localized pulmonary edema and/or atelectasis	Centrilobular nodules
		Multiple consolidations
		Air bronchogram
		Tree-in-bud sign
		Pleural effusion

COVID-19: Coronavirus disease 2019; GGOs: Ground glass opacities.