title: Atoll sign or reversed halo sign? Which term should be used?
authors.forename: Edson
authors.initials: E
authors.lastname: Marchiori
authors.forename: Klaus L
authors.initials: KL
authors.lastname: Irion
authors.forename: Gláucia
authors.initials: G
authors.lastname: Zanetti
authors.forename: Bruno
authors.initials: B
authors.lastname: Hochhegger
mesh_terms: D018549:Cryptogenic Organizing Pneumonia / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011859:Radiography