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. 2021 Aug 10;7(8):e07743. doi: 10.1016/j.heliyon.2021.e07743

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© 2021 The Author(s)

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

PMC Copyright notice

Cases illustrative of ununified classification in all reporting systems. Axial chest computed tomography image of a 77-year-old man with coronavirus disease 2019 (COVID-19) obtained 3 days after the onset of symptoms shows linear and reticulated opacity in the right lower lobe and ground-glass opacity along with bronchial duct in the left lower lobe. Our classification was divided as follows: CO-RADS: divided into 2, 3, and 4 (classified by two radiologists for each), COVID-RADS: divided into 1 (classified by one radiologist), 2A (two), 2B (two), or 3 (one), RSNA expert consensus statement: divided into Neg (classified by one radiologist who considered these findings not indicating pneumonia), Aty (two), and Ind (three). CO-RADS, COVID-19 Reporting and Data System; COVID-RADS, COVID-19 Imaging Reporting and Data system; RSNA, Radiological Society of North America.