ArticleRadiologia brasileira
Reversed halo sign on chest computed tomography: a retrospective analysis of 286 cases.
Article in Radiologia brasileira. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed.
- A Diagnostic Pitfall of the Reversed Halo Sign: Pulmonary Infarction Mistaken for Pneumonia.Clinical case reports · 2026Article
- The reversed halo sign in pulmonary paracoccidioidomycosis.Revista da Sociedade Brasileira de Medicina Tropical · 2025Article
Corrections and comments
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Objective: To characterize the main causes of the reversed halo sign (RHS) on computed tomography (CT) of the chest and its imaging features. Materials and Methods: This was a retrospective study reviewing all chest CT scans for which the report contained the term "reversed halo sign" among those performed between 2015 and 2020 at a tertiary care hospital. Results: A total of 286 cases were identified, and the corresponding CT images and clinical data were reviewed. In this population, the most common cause of an RHS was pulmonary infarction (in 42%), followed by cryptogenic organizing pneumonia (in 17%) and bacterial pneumonia (in 16%). In addition, the CT characteristics of the RHS were identified in various conditions, such as pulmonary thromboembolism with pulmonary infarction, in which the RHS was typically smooth-walled and solitary with a peripheral distribution. Conclusion: The RHS can be observed in many contexts, and its CT characteristics, in combination with the clinical picture, can help narrow the differential diagnosis.
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