Minireviews
Copyright ©The Author(s) 2020.
World J Radiol. Dec 28, 2020; 12(12): 272-288
Published online Dec 28, 2020. doi: 10.4329/wjr.v12.i12.272
Table 2 Proposed standardized guidelines for reporting computed tomography findings related to coronavirus disease 2019[55]
COVID-19 pneumonia imaging classification
CT findings
Rationale
Typical appearancePeripheral, bilateral, ground-glass opacities with or without consolidation or a “crazy-paving” patternCT imaging features most specifically associated with COVID-19
Multifocal ground-glass opacities of rounded morphology with or without consolidation or visible intralobular lines (“crazy-paving” pattern)
Reverse halo sign or other findings of organizing pneumonia
Indeterminate appearanceAbsence of typical features + the presence of the following features: Multifocal, diffuse, perihilar, or unilateral ground-glass opacity with or without consolidation lacking a specific distribution and that are nonrounded or non-peripheralNon-specific CT imaging features of COVID-19 pneumonia
Few small ground-glass opacities, with a nonrounded and non-peripheral distribution
Atypical appearanceAbsence of typical or indeterminate features + the presence of the following features: Isolated lobar or segmental consolidation without ground-glass opacities; discrete small nodules (centrilobular, “tree-in-bud” appearance); lung cavitation; smooth interlobular septal thickening with pleural effusionRarely associated with or not reported features of COVID-19
Negative for pneumoniaNo features of pneumonia on chest CTNo features of pneumonia