title: [Comparative study of 2 different methods for the radiographic determination of total pulmonary volume].
mesh_terms: D006371:Helium; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008171:Lung Diseases / Q000000981:diagnostic imaging*; D008433:Mathematics; D008722:Methods; D011859:Radiography; D012129:Respiratory Function Tests; D013147:Spirometry
chemical_list: D006371:Helium
vernacular_title: Estudio comparativo de dos metódicas distintas para la determinación radiográfica del volumen pulmonar total.