Citation, DOI, disclosures and article data
Citation:
Feger J, Ring around artery sign. Reference article, Radiopaedia.org (Accessed on 11 May 2024) https://doi.org/10.53347/rID-77611
The ring around artery sign refers to a (semi-) circular radiolucency surrounding the right pulmonary artery caused by mediastinal air in the case of pneumomediastinum 1-3.
The sign was originally described on lateral chest radiographs 1-4 but can be equally appreciated on sagittal multiplanar reconstructions on a chest CT 4.
Associated findings
Any radiolucent streaks or air bubbles around the mediastinal structures, including the following other signs 2,4:
See also
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1. Bejvan S & Godwin J. Pneumomediastinum: Old Signs and New Signs. AJR Am J Roentgenol. 1996;166(5):1041-8. doi:10.2214/ajr.166.5.8615238
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2. Hammond D. The "Ring-Around-The-Artery" Sign in Pneumomediastinum. J Can Assoc Radiol. 1984;35(1):88-9. PMID 6725378
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3. Agarwal P. The Ring-Around-The-Artery Sign. Radiology. 2006;241(3):943-4. doi:10.1148/radiol.2413041063
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4. Sakai M, Hiyama T, Kuno H et al. Thoracic Abnormal Air Collections in Patients in the Intensive Care Unit: Radiograph Findings Correlated with CT. Insights Imaging. 2020;11(1):1-17. doi:10.1186/s13244-020-0838-z
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