The bullseye sign: A variant of the reverse halo sign in COVID-19 pneumonia

Clin Imaging. 2020 Dec:68:191-196. doi: 10.1016/j.clinimag.2020.07.024. Epub 2020 Jul 28.

Abstract

The predominant pulmonary imaging findings on chest CT in the novel 2019 coronavirus infection (COVID-19) are bilateral ground glass opacities. The reverse halo sign is uncommon. This is a report of the new "bullseye sign," which is considered a variant of the reverse halo sign and favored to represent a focus of organizing pneumonia. The specificity of this finding is unclear, however its presence should alert radiologists to the possibility of COVID-19 infection.

Keywords: COVID-19; CT scan; Coronavirus; Pneumonia; Viral.

MeSH terms

  • Betacoronavirus*
  • COVID-19
  • Coronavirus Infections* / epidemiology
  • Four-Dimensional Computed Tomography
  • Humans
  • Lung / diagnostic imaging
  • Pandemics*
  • Pneumonia, Viral*
  • SARS-CoV-2