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

Figure 3.

Figure 3

Representative false-positive and false-negative coronavirus disease 2019 (COVID-19) cases. (a, b) Axial chest computed tomography (CT) images of a 74-year-old woman without COVID-19 obtained 7 days after the onset of symptoms show bilateral, peripheral multifocal ground-glass opacity. Our majority classification was CO-RADS 5, COVID-RADS 3, and typical for pneumonia in the RSNA expert consensus statement (false positive on all the three reporting systems). (c) Axial chest CT image of an 89-year-old man with COVID-19 obtained on the same day as that of onset of symptoms shows no abnormal findings. Our majority classification was CO-RADS 1, COVID-RADS 0, and negative for pneumonia in the RSNA expert consensus statement (false negative on all the three reporting systems). CO-RADS, COVID-19 Reporting and Data System; COVID-RADS, COVID-19 Imaging Reporting and Data system; RSNA, Radiological Society of North America.