title: The cupola sign.
authors.affiliation: Department of Diagnostic Imaging, Foothills Medical Centre, 1403 29th Ave NW, Calgary, AB, Canada T2N 2T9.
authors.forename: Geoffrey B
authors.initials: GB
authors.lastname: Marshall
mesh_terms: D006801:Humans; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging*; D013902:Radiography, Thoracic; D016683:Supine Position; D013904:Thoracic Vertebrae / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*