title: Reversed halo sign: Criteria for narrowing the differential diagnosis.
authors.affiliation: Departamento de Radiología, Federal University of Rio de Janeiro, Río de Janeiro, Brasil. Electronic address: edmarchiori@gmail.com.
authors.forename: Edson
authors.initials: E
authors.lastname: Marchiori
authors.affiliation: Departamento de Radiología, Federal University of Rio de Janeiro, Río de Janeiro, Brasil.
authors.forename: Carmen Lucia
authors.initials: CL
authors.lastname: Arantes Pereira Azevedo
authors.affiliation: Departamento de Radiología, Federal University of Rio de Janeiro, Río de Janeiro, Brasil.
authors.forename: Gláucia
authors.initials: G
authors.lastname: Zanetti
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008168:Lung; D014057:Tomography, X-Ray Computed