Bull’s eye sign – A diagnostic clinch in COVID-19 pneumonia



  • Navdeep Kaur | drdhillonnavdeep@gmail.com Department of Radiodiagnosis, All India Institute of Medical Sciences, Bathinda, Punjab, India. https://orcid.org/0000-0002-0654-3116
  • Amandeep Kaur Department of General Medicine, All India Institute of Medical Sciences, Bathinda, Punjab, India.
  • Harvinder Singh Chhabra Department of Forensic Medicine, Guru Gobind Singh Medical College and Hospital, Faridkot, Punjab, India.


Although typical imaging findings of COVID-19 pneumonia has been described it may be difficult at times to distinguish it from other viral pneumonias. In the following case series, we describe a typical sign i.e. Bull’s-eye sign in COVID-19 pneumonia. As this sign is not associated with any known pulmonary disease, so its presence may help radiologists to differentiate COVID-19 pneumonia from its mimics.



PlumX Metrics


Download data is not yet available.


Huang C, Wang Y, Li X, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet 2020;395:497-506.

Song F, Shi N, Shan F, et al. Emerging coronavirus 2019-nCoV pneumonia. Radiology 2020;295:210-7.

Pan F, Ye T, Sun P, et al. Time course of lung changes on chest CT during recovery from 2019 novel Coronavirus (COVID-19) pneumonia. Radiology 2020;295:715–21.

Chung M, Bernheim A, Mei X, et al. CT imaging features of 2019 novel coronavirus (2019-nCoV). Radiology 2020;295:202–7.

Ai T, Yang Z, Hou H, et al. Correlation of chest CT and RT-PCR testing in coronavirus disease 2019 (COVID-19) in China: a report of 1014 cases. Radiology 2020;296:E32–E40.

Kong W, Agarwal PP. Chest imaging appearance of COVID-19 infection. Radiol Cardiothorac Imaging 2020;2:e200028.

Yoon SH, Lee KH, Kim JY, et al. Chest radiographic and CT findings of the 2019 novel coronavirus disease (COVID-19): analysis of nine patients treated in Korea. Korean J Radiol 2020;21:494–500.

Baque-Juston M, Pellegrin A, Leroy S, et al. Organizing pneumonia: what is it? A conceptual approach and pictorial review. Diagn Interv Imaging 2014;95:771-7.

Bernheim A, Mei X, Huang M, et al. Chest CT findings in coronavirus disease-19 (COVID-19): relationship to duration of infection. Radiology 2020;295:685–91.

Li Y, Xia L. Coronavirus disease 2019 (COVID-19): role of chest CT in diagnosis and management. AJR Am J Roentgenol 2020;214:1280-6.

Lomoro P,Verde F, Zerboni F, et al. COVID-19 pneumonia manifestations at the admission on chest ultrasound, radiographs, and CT: single-center study and comprehensive radiologic literature review. Eur J Radiol Open 2020;7:1–11.

Bai HX, Hsieh B, Xiong Z, et al. Performance of radiologists in differentiating COVID-19 from viral pneumonia on chest CT. Radiology 2020;296:E46-E54.

Zhao H, Liang T, Wu CC, Jin C. The reversed halo sign in COVID-19 pneumonia. Research Square 2020. Available from: https://www.researchsquare.com/article/rs-20394/v1

McLaren TA, Gruden JF, Green DB. The bullseye sign: A variant of the reverse halo sign in COVID-19 pneumonia. Clin Imaging 2020; 68:191-6.

Bikdeli B, Madhavan MV, Jimenez D, et al. COVID-19 and thrombotic or thromboembolic disease: implications for prevention, antithrombotic therapy, and follow-up: JACC state-of-the-art review. J Am Coll Cardiol 2020;75:2950–73.

Boraschi P. COVID-19 pulmonary involvement: is really an interstitial pneumonia? Acad Radiol 2020;27:900.

Wu Y, Xie Y, Wang X. Longitudinal CT findings in COVID-19 pneumonia: case presenting organizing pneumonia pattern. Radiol Cardiothorac Imaging 2020;2:e200031.

Shaghaghi S, Daskareh M, Irannejad M, et al. Target-shaped combined halo and reversed-halo sign, an atypical chest CT finding in COVID-19. Clin Imaging 2021;69:72-4.


COVID-19 - Collection of articles on the Coronavirus outbreak
Supporting Agencies
COVID-19, Pneumonia, Computed Tomography
  • Abstract views: 79

  • PDF: 36
How to Cite
Kaur, Navdeep, Amandeep Kaur, and Harvinder Singh Chhabra. 2021. “Bull’s Eye Sign – A Diagnostic Clinch in COVID-19 Pneumonia”. Monaldi Archives for Chest Disease, September. https://doi.org/10.4081/monaldi.2021.1908.