Interpretation of CT signs of 2019 novel coronavirus (COVID-19) pneumonia
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Interpretation of CT signs of 2019 novel coronavirus (COVID-19) pneumonia Jing Wu 1 & Junping Pan 2 & Da Teng 3 & Xunhua Xu 4 & Jianghua Feng 5 & Yu-Chen Chen 1 Received: 18 February 2020 / Revised: 12 April 2020 / Accepted: 23 April 2020 # European Society of Radiology 2020
Abstract Objectives To characterize and interpret the CT imaging signs of the 2019 novel coronavirus (COVID-19) pneumonia in China. Materials and methods The CT images of 130 patients diagnosed as COVID-19 pneumonia from several hospitals in China were collected and their imaging features were analyzed and interpreted in detail. Results Among the 130 patients, we can see (1) distribution: 14 cases with unilateral lung disease and 116 cases with bilateral disease, the distribution was mainly lobular core (99 cases) and subpleural (102 cases); (2) number: 9 cases with single lesion, 113 cases with multiple lesions, and 8 cases with diffuse distribution; (3) density: 70 cases of pure ground glass opacity (GGO), and 60 cases of GGO with consolidation; (4) accompanying signs: vascular thickening (100 cases), “parallel pleura sign” (98 cases), “paving stone sign” (100 cases), “halo sign” (18 cases), “reversed halo sign” (6 cases), pleural effusion (2 cases), and pneumonocele (2 cases). After follow-up CT examination on 35 patients, 21 cases turned better and 14 became worse. There were signs of consolidation with marginal contraction, bronchiectasis, subpleural line, or fibrous streak. Conclusion GGO and consolidation are the most common CT signs of COVID-19 pneumonia, mainly with lobular distribution and subpleural distribution. The main manifestations were tissue organization and fibrosis at late stage. The most valuable features are the parallel pleura sign and the paving stone sign. Key Points • The CT signs of the COVID-19 pneumonia are mainly distributed in the lobular core, subpleural and diffused bilaterally. • The CT signs include the “parallel pleura sign,” “paving stone sign,” “halo sign,” and “reversed halo sign.” • During the follow-up, the distribution of lobular core, the fusion of lesions, and the organization changes at late stage will appear. Keywords Coronavirus infections . Pneumonia . Tomography, x-ray computed
Jing Wu and Junping Pan contributed equally to this work. * Yu-Chen Chen [email protected] 1
Department of Radiology, Nanjing First Hospital, Nanjing Medical University, No.68, Changle Road, Nanjing 210006, China
2
Department of Radiology, Qujiang District People’s Hospital, Lung Imaging Alliance, Shaoguan 512100, China
3
Department of Radiology, Fifth People’s Hospital of Jiamusi Infectious Disease Hospital, Jiamusi 154001, China
4
Department of Radiology, CR & WISCO General Hospital, Wuhan 430080, China
5
Department of Radiology, Shanghai Hospital, Wanzhou District, Chongqing 404100, China
Abbreviations ARDS Acute respiratory distress syndrome COP Cryptogenic organizing pneumonia COVID-19 2019 novel coronavirus GGO Ground-glass opacity MERS Middle East respiratory syndrome NCP Novel coronavirus pn
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