1.Radiographic features of COVID-19 based on an initial cohort of 96 patients in Singapore.
Hau Wei Wei KHOO ; Terrence Chi Hong HUI ; Salahudeen Mohamed Haja MOHIDEEN ; Yeong Shyan LEE ; Charlene Jin Yee LIEW ; Shawn Shi Xian KOK ; Barnaby Edward YOUNG ; Sean Wei Xiang ONG ; Shirin KALIMUDDIN ; Seow Yen TAN ; Jiashen LOH ; Lai Peng CHAN ; Angeline Choo Choo POH ; Steven Bak Siew WONG ; Yee-Sin LEO ; David Chien LYE ; Gregory Jon Leng KAW ; Cher Heng TAN
Singapore medical journal 2021;62(9):458-465
INTRODUCTION:
Chest radiographs (CXRs) are widely used for the screening and management of COVID-19. This article describes the radiographic features of COVID-19 based on an initial national cohort of patients.
METHODS:
This is a retrospective review of swab-positive patients with COVID-19 who were admitted to four different hospitals in Singapore between 22 January and 9 March 2020. Initial and follow-up CXRs were reviewed by three experienced radiologists to identify the predominant pattern and distribution of lung parenchymal abnormalities.
RESULTS:
In total, 347 CXRs of 96 patients were reviewed. Initial CXRs were abnormal in 41 (42.7%) out of 96 patients. The mean time from onset of symptoms to CXR abnormality was 5.3 ± 4.7 days. The predominant pattern of lung abnormality was ground-glass opacity on initial CXRs (51.2%) and consolidation on follow-up CXRs (51.0%). Multifocal bilateral abnormalities in mixed central and peripheral distribution were observed in 63.4% and 59.2% of abnormal initial and follow-up CXRs, respectively. The lower zones were involved in 90.2% of initial CXRs and 93.9% of follow-up CXRs.
CONCLUSION
In a cohort of swab-positive patients, including those identified from contact tracing, we found a lower incidence of CXR abnormalities than was previously reported. The most common pattern was ground-glass opacity or consolidation, but mixed central and peripheral involvement was more common than peripheral involvement alone.
COVID-19
;
Humans
;
Lung/diagnostic imaging*
;
Radiography, Thoracic
;
Retrospective Studies
;
SARS-CoV-2
;
Singapore
Result Analysis
Print
Save
E-mail