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. 2021 Apr 30;27(4):1078–1084. doi: 10.1016/j.radi.2021.04.010

Figure 4.

Figure 4

a) Example of a false negative case on chest CT: although RT-PCR was positive for SARS-CoV-2, the CT image shows a single ground-glass opacity (GGO) focus at the level of the left upper lobe anterior segment, and all readers defined the finding as CO-RADS category 3. b) Typical CT appearance of COVID-19 pneumonia, showing multifocal bilateral, peripheral/subpleural GGOs, correctly diagnosed as CO-RADS category 5 by all readers (Note – COVID-19: Coronavirus Disease-19; CT: Computed Tomography; SARS-CoV-2: Severe Acute Respiratory Syndrome Coronavirus 2; RT-PCR: Reverse Transcriptase-Polymerase Chain Reaction; CT: Computed Tomography; CO-RADS: COVID-19 Reporting and Data System).