Table 2 Reporting language by RSNA for CT findings related to COVID-19
From: COVITALE 2020 from eastern Indian population: imageologists perspective, a learning curve
Classification | CT findings | Rationale |
|---|---|---|
Typical appearance | Peripheral, bilateral, GGO with or without consolidation or visible intralobular lines (“crazy-paving”) Multifocal GGO of rounded morphology with or without consolidation or visible intralobular lines (“crazy-paving”) Reverse halo sign or other findings of organizing pneumonia (seen later in the disease) | Commonly reported imaging features of greater specificity for COVID-19 pneumonia |
Indeterminate appearance | Absence of typical features AND presence of: Multifocal, diffuse, perihilar or unilateral GGO with or without consolidation lacking a specific distribution and are non-rounded or non-peripheral Few very small GGO with a non-rounded and non-peripheral distribution | Non-specific imaging features of COVID-19 pneumonia |
Atypical appearance | Absence of typical or indeterminate features and presence of: Isolated lobar or segmental consolidation without GGO Discrete small nodules (centrilobular,“tree-in bud”) Lung cavitation Smooth interlobular septal thickening with pleural effusion | Uncommonly or not reported features of COVID-19 pneumonia |
Negative for pneumonia | No CT features to suggest pneumonia | No features of pneumonia |