title: Understanding chest x-rays.
mesh_terms: D006331:Heart Diseases / Q000000981:diagnostic imaging; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging; D009730:Nursing Assessment; D009732:Nursing Care; D013902:Radiography, Thoracic; D013896:Thoracic Diseases / Q000000981:diagnostic imaging