title: Signs in cardiopulmonary imaging: luftsichel sign.
authors.forename: Kevin
authors.initials: K
authors.lastname: Day
authors.forename: Isabel
authors.initials: I
authors.lastname: Oliva
mesh_terms: D003952:Diagnostic Imaging; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000473:pathology*; D019568:Lung, Hyperlucent / Q000000981:diagnostic imaging*; D009929:Organ Size; D011859:Radiography