title: Ventilation-perfusion studies--clinical aspects.
mesh_terms: D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology*; D011868:Radioisotopes; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio; D014978:Xenon
chemical_list: D011868:Radioisotopes; D014978:Xenon