Table 3.
The proposed coronavirus disease 2019 (COVID-19) imaging reporting and data system (COVID-RADS) [50].
| CT findings | Description | COVID-RADS grade | Level of suspicion |
|---|---|---|---|
| Normal chest CT | 0 | Low | |
| Atypical findings | - Pleural effusion | 1 | Low |
| (Inconsistent with COVID-19) | - Cavity | ||
| - Pulmonary nodule(s) | |||
| - Nodular pattern | |||
| - Lymphadenopathy | |||
| - Peribronchovascular distribution | |||
| - Halo sign | |||
| - Tree-in-bud sign | |||
| - Bronchiectasis | |||
| - Airway secretions | |||
| - Pulmonary emphysema | |||
| - Pulmonary fibrosis | |||
| - Isolated pleural thickening | |||
| - Pneumothorax | |||
| - Pericardial effusion | |||
| Fairly typical findings | - Single GGO (early) | 2A | Moderate |
| - Consolidation without GGO (late/complicated) | |||
| - Focal pleural thickening | |||
| - Vascular enlargement | |||
| - Air bronchogram | |||
| - Bronchial wall thickening | |||
| - White lung stage (late/complicated) | |||
| - Parenchymal fibrotic bands (late/remission) | |||
| Combination of atypical findingswith typical/fairly typical findings | 2B | Moderate | |
| Typical findings | - Multifocal GGO | 3 | High |
| - GGO with superimposed consolidation | |||
| - Consolidation predominant pattern | |||
| (late/complicated) | |||
| - Linear opacities (late/complicated) | |||
| - Crazy paving pattern (late/complicated) | |||
| - Melted sugar sign (late/remission) |
GGO, ground glass opacity.