Adapted RSNA consensus guidelines for reporting CT findings related to COVID-19a
| CT Imaging Appearance | Pulmonary CT Findings | Suggested Reporting Language |
|---|---|---|
| Typical | Crazy paving | “Commonly reported imaging features of (COVID-19) pneumonia are present. Other processes such as influenza pneumonia and organizing pneumonia, as can be seen with drug toxicity and connective tissue disease, can cause a similar imaging pattern.” |
| Bilateral | ||
| Peripheral | ||
| GGO | ||
| Bilateral | ||
| Peripheral | ||
| Multifocal | ||
| Rounded | ||
| Organizing pneumonia | ||
| Indeterminate | No typical features and | “Imaging features can be seen with (COVID-19) pneumonia, though are nonspecific and can occur with a variety of infectious and noninfectious processes.” |
| GGO | ||
| Multifocal | ||
| Diffuse | ||
| Perihilar | ||
| Unilateral | ||
| Nonrounded | ||
| Atypical | No typical or indeterminate features and | “Imaging features are atypical or uncommonly reported for (COVID-19) pneumonia. Alternative diagnosis should be considered.” |
| Isolated lobar or segmental consolidation without GGO | ||
| Centrilobular nodules | ||
| Cavitation | ||
| Smooth interlobular septal thickening with pleural effusion | ||
| Negative | No CT features of pneumonia | “No CT findings present to indicate pneumonia. (Note: CT may be negative in the early stages of COVID-19.)” |
a
This table was adapted from Simpson et al.6 Crazy paving is rounded ground glass opacification associated with inter- and intralobular septal thickening. Organizing pneumonia is a focus of GGO with peripheral consolidation previously described as “atoll sign” or “reverse halo sign.”