Fig. 4.

CT scans of COVID-19 pneumonia mistaken for non-COVID-19 pneumonia (a) Only case misdiagnosed by all five radiologists: 64-year-old woman with COVID-19 pneumonia, 14 days after symptom onset, showing nodules of ground glass opacity (arrows). (b-d) Examples misdiagnosed by four of five radiologists: (b) 79-year-old man, 2 days after symptom onset, demonstrating diffuse ground glass opacities, (c) 67-year-old woman, 20 days after symptom onset, demonstrating consolidation in the right lower lobe (arrow). (d) Example misdiagnosed by three of five radiologists: 70-year-old man, 4 days after symptom onset, demonstrating a solitary rounded ground glass opacity in the left upper lobe (arrow).