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Fig. 2 | BMC Infectious Diseases

Fig. 2

From: Dynamic changes in clinical and CT characteristics of COVID-19 cases with different exposure histories: a retrospective study

Fig. 2

CT images of COVID-19 patients with different exposure history. Axial CT images of a patient living in Wuhan, Hubei, who arrived in Beijing 9 days before admission (a-d). The initial CT image showed ground-glass opacity and patchy shadowing, with air bronchial signs, in the right lower lobe (day 6 after symptom onset) (a). Image obtained 4 days after admission showed the increased size, number and density of the lesions in both lungs (day 10 after symptom onset) (b). Follow-up CT image 8 days after admission showed progressive consolidation (day 14 after symptom onset) (c). Follow-up CT image 18 days after discharge showed obvious absorption with ground-glass opacity (day 45 after symptom onset) (d). Coronal CT images of a patient with a short travel history to Wuhan, Hubei, 4 days before admission (e-h). The initial CT image exhibited ground-glass opacity in the left lower lobe and right upper lobe (red arrow) (day 3 after symptom onset) (e). CT images 4 days after admission exhibited that the size, number and density of the lesions increased (day 7 after symptom onset) (f). CT images 8 days after admission exhibited that the density of the lesions decreased (day 11 after symptom onset) (g). CT images 24 days after discharge exhibited almost complete absorption with only light ground-glass opacity in the left lower lobe and right upper lobe (red arrows) (day 36 after symptom onset) (h). Axial CT images of a patient, who had not visited Wuhan, but did have contact with a confirmed patient from Wuhan, 10 days before admission (i-m). CT image at admission presented as ground-glass opacity with strip-shaped consolidation in the right lower lobe and ground-glass opacity in the tongue segment of the left superior lobe (red arrow) (day 6 after symptom onset) (i). Follow-up CT image 4 days after admission showed decreased lesion density (day 10 after symptom onset) (j). CT image on day 8 day after admission presented as slight absorption with strip shadowing (day 14 after symptom onset) (k). Follow-up CT image 16 days after discharge showed almost complete absorption with only light ground-glass opacity (red arrow) (day 31 after symptom onset) (l). Follow-up CT image 30 days after discharge showed complete absorption (day 45 after symptom onset) (m). Notes: The CT images a, e, i and j were provided with slice thickness of 5 mm, the rest CT images were thin-section high resolution

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