title: [Measurement of regional ventilation to perfusion ratios with 133Xe in chronic obstructive lung diseases (author's transl)].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio; D014980:Xenon Radioisotopes
chemical_list: D014980:Xenon Radioisotopes