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Insights into Imaging
Fig. 5 | Insights into Imaging

Fig. 5

From: Emergency department CT examinations demonstrate no evidence of early viral circulation at the start of the COVID-19 pandemic—a multicentre epidemiological study

Fig. 5

Time series analysis indexed by week. A Number (no.) of CT scans performed at IMADIS teleradiology during the study period. No. of reports with (B) 1, (C) 2, (D) 3 or 4 out of 4 text features identified by the text mining approach. E Daily number. of patients with a positive RT-PCR for COVID-19 according to French ‘Santé Publique France’. Red dotted line: February 17, 2020, i.e. break point for the presence of at least 3 radiological labels among ‘bilateral’, ‘supleural’, ‘ground glass opacities’ and ‘reticulations’. Blue dotted lines: first official Chinese patient (November 17, 2019) and first official patients in France (January 24, 2020)

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