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Dynamic Imaging Changes of COVID-19 Pneumonia at Different Stages

Author(s):

Xiao-Yan Lv*, Wei-Hong Xing*, Xi Ma*, Li-Hong Xing, Yu Zhang, Yi-Bo Lu, Li Dong, Meng Zheng, Xiao-Ping Yin, Wei-Min An and Bu-Lang Gao*  

Abstract:


Purpose: To investigate the Computed Tomography (CT) imaging characteristics and dynamic changes of COVID-19 pneumonia at different stages.

Methods: Forty-six patients infected with COVID-19 who had chest CT scans were enrolled, and CT scans were performed 4-6 times with an interval of 2-5 days.

Results: At the early stage (n=25), ground glass opacity was presented in 11 patients (11/25 or 44.0%) and ground glass opacity mixed with consolidation in 13 (13/25 or 52.0%) in the lung CT images. At the progressive stage (n=38), ground glass opacity was presented in only one patient (1/38 or 2.6%) and ground glass opacity mixed with consolidation in 33 (33/38 or 86.8%). In the early improvement stage (n=38), the imaging presentation was ground glass opacity alone in three patients (3/38 or 7.9%) and ground glass opacity mixed with consolidation in 34 (34/38 or 89.5%). In the late improvement (absorption) stage (n=33), the primary imaging presentation was ground glass presentation in eight patients (8/33 or 24.2%) and ground glass opacity mixed with consolidation in 23 (23/33 or 69.7%). The lesion reached the peak at 4-16 days after disease onset, and 26 (26/38 or 68.4%) patients reached the disease peak within ten days. Starting from 6 to 20 days after onset, the disease began to be improved, with 30 (30/38 or 78.9%) patients being improved within 15 days.

Conclusion: COVID-19 pneumonia will progress to the peak stage at a mediate time of seven days and enter the improvement stage at twelve days. Computed tomography imaging of the pulmonary lesion has a common pattern from disease onset to improvement and recovery and provides important information for evaluation of the disease course and treatment effect.

Keywords:

COVID-19 SARS-CoV-2 virus, radiography, viral infection, imaging, dynamic changes

Affiliation:

Department of Radiology, The Fifth Medical Center of Chinese PLA General Hospital, 100 West Fourth Ring Road, Fengtai District, Beijing, The Fifth Hospital of Shijiazhuang, Shijiazhuang, Affiliated Hospital of Hebei University, Baoding, Hebei Province, Affiliated Hospital of Hebei University, Baoding, Hebei Province, Affiliated Hospital of Hebei University, Baoding, Hebei Province, The Fourth People’s Hospital of Nanning City, Nanning, Guangxi, Baoding People’s Hospital, Baoding, Department of Radiology, The Fifth Medical Center of Chinese PLA General Hospital, 100 West Fourth Ring Road, Fengtai District, Beijing, Affiliated Hospital of Hebei University, Baoding, Hebei Province, Department of Radiology, The Fifth Medical Center of Chinese PLA General Hospital, 100 West Fourth Ring Road, Fengtai District, Beijing, Affiliated Hospital of Hebei University, Baoding, Hebei Province



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