title: Oxygen reservoir rebreathing mask simulating pneumothorax.
abstract: A case in which the superimposition of an oxygen rebreathing mask reservoir bag simulated pneumothorax on radiographs of the chest is described. A double white line parallel to the lateral ribs produced by the double seam of the bag distinguishes this artifact from a true pneumothorax.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D010102:Oxygen Inhalation Therapy / Q000295:instrumentation*; D011030:Pneumothorax / Q000000981:diagnostic imaging*; D011859:Radiography