Use of radioactive gases in studies of regional lung function.
D006801:Humans; D009587:Nitrogen Isotopes; D011868:Radioisotopes; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio; D014978:Xenon
D009587:Nitrogen Isotopes; D011868:Radioisotopes; D014978:Xenon