Fig. 3.

Structured report displayed in the MMRT format (www.radreport.org). a Sections “Procedure Information” and “Clinical Information”. b Section “Parenchyma”. c Sections “Mediastinum and Vascular findings”, and “Impression.” The subsection classification is based on the paper by Simpson et al. [13], as follows: Typical—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). Atypical—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. Indeterminate—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. Negative—no CT features to suggest pneumonia. The subsection “Select CO-RADS category” is based on the paper by Prokop et al. [10], as follows: CO-RADS 0 not interpretable: scan technically insufficient for assigning a score; CO-RADS 1 very low: normal or non-infections; CO-RADS 2 low: typical for other infection but not COVID-19. CO-RADS 3 equivocal/unsure: features compatible with COVID-19, but also other diseases. CO-RADS 4 high: suspicious for COVID-19. CO-RADS 5 very high: typical for COVID-19. CO-RADS 6 proven: RT-PCR positive for SARS-CoV-2