The ring-around-the-artery sign.
Agarwal
Prachi P
PP
Department of Diagnostic Imaging, the Ottawa Hospital, Civic Campus, 1053 Carling Ave, Ottawa, ON, Canada K1Y 4E9. prachipragya@yahoo.com
D003937:Diagnosis, Differential; D006801:Humans; D008478:Mediastinal Emphysema / Q000000981:diagnostic imaging*; D011651:Pulmonary Artery; D013902:Radiography, Thoracic