title: [Standardization heart X-ray study].
authors.affiliation: Russian Medical Academy of Postgraduate Training, Moscow.
authors.forename: L
authors.initials: L
authors.lastname: Nizovtsova
mesh_terms: D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D013902:Radiography, Thoracic / Q000379:methods / Q000592:standards*