Chest CT target sign in a couple with COVID-19 pneumonia

We describe a target sign on chest CT characterized by a combination of peripheral ring-like opacity and a central nodular ground-glass opacity surrounding a vessel in a couple with COVID-19 pneumonia confirmed by real-time reverse transcriptase fluorescence polymerase chain reaction sputum analysis.

Keywords:
Coronavirus infection; Coronavirus; Computed tomography

Authorship

C. Isabela Silva Müller Correspondence: C. Isabela Silva Müller, PhD. Clínica Delfin - Setor de Imagem Torácica. Avenida Antônio Carlos Magalhães, 442, Pituba. Salvador, BA, Brazil, 41800-700. Email: c.isabela.silva@gmail.com.

Section of Thoracic Imaging - Clínica Delfin, Salvador, BA, Brazil.Clínica DelfinBrazilSalvador, BA, BrazilSection of Thoracic Imaging - Clínica Delfin, Salvador, BA, Brazil.

a https://orcid.org/0000-0003-2422-2735.

https://orcid.org/0000-0003-2422-2735

Nestor L. Müller

Department of Radiology - Vancouver General Hospital, and University of British Columbia, Vancouver, BC, Canada.University of British ColumbiaCanadaVancouver, BC, CanadaDepartment of Radiology - Vancouver General Hospital, and University of British Columbia, Vancouver, BC, Canada.

b https://orcid.org/0000-0002-0657-8175.

https://orcid.org/0000-0002-0657-8175

Correspondence: C. Isabela Silva Müller, PhD. Clínica Delfin - Setor de Imagem Torácica. Avenida Antônio Carlos Magalhães, 442, Pituba. Salvador, BA, Brazil, 41800-700. Email: c.isabela.silva@gmail.com.

a
https://orcid.org/0000-0003-2422-2735.

b
https://orcid.org/0000-0002-0657-8175.

SCIMAGO INSTITUTIONS RANKINGS

Section of Thoracic Imaging - Clínica Delfin, Salvador, BA, Brazil.Clínica DelfinBrazilSalvador, BA, BrazilSection of Thoracic Imaging - Clínica Delfin, Salvador, BA, Brazil.

Figures

Figures (2)

Thumbnail

Figure 1
Nonenhanced cross-sectional CT image of the right lung (A) in a 37-year-old woman with COVID-19 pneumonia and minimal dyspnea shows an irregular ring-like opacity containing in its center a small nodular ground-glass opacity surrounding a very small vessel (arrow). The combination of central nodular opacity and the peripheral ring of increased opacity resemble a shooting target (B) thus resulting in a CT target sign. The target sign can also be seen in the sagittal (C, arrow) and coronal (D, arrow) reformations. Also noted are small patchy ground-glass opacities.

Thumbnail

Figure 2
Cross-sectional nonenhanced chest CT image of the left lung in a 38-year-old man (husband of patient showed in Figure 1) with COVID-19 pneumonia shows poorly defined ring-like opacity surrounding a subtle area of ground-glass attenuation and in its center a poorly defined nodular ground-glass opacity surrounding a vascular structure (arrow), resulting in a target sign. Also noted are patchy ground-glass opacities and small poorly defined nodule with halo of ground glass opacity in the left upper lobe (curved arrow).

Figure 1 Nonenhanced cross-sectional CT image of the right lung (A) in a 37-year-old woman with COVID-19 pneumonia and minimal dyspnea shows an irregular ring-like opacity containing in its center a small nodular ground-glass opacity surrounding a very small vessel (arrow). The combination of central nodular opacity and the peripheral ring of increased opacity resemble a shooting target (B) thus resulting in a CT target sign. The target sign can also be seen in the sagittal (C, arrow) and coronal (D, arrow) reformations. Also noted are small patchy ground-glass opacities.

Figure 2 Cross-sectional nonenhanced chest CT image of the left lung in a 38-year-old man (husband of patient showed in Figure 1) with COVID-19 pneumonia shows poorly defined ring-like opacity surrounding a subtle area of ground-glass attenuation and in its center a poorly defined nodular ground-glass opacity surrounding a vascular structure (arrow), resulting in a target sign. Also noted are patchy ground-glass opacities and small poorly defined nodule with halo of ground glass opacity in the left upper lobe (curved arrow).

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Chest CT target sign in a couple with COVID-19 pneumonia

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[1] Correspondence: C. Isabela Silva Müller, PhD. Clínica Delfin - Setor de Imagem Torácica. Avenida Antônio Carlos Magalhães, 442, Pituba. Salvador, BA, Brazil, 41800-700. Email: c.isabela.silva@gmail.com.