title: Ventilation perfusion distribution in patients with bronchial asthma using 81mKr.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001249:Asthma / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007726:Krypton; D008297:Male; D011868:Radioisotopes; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio
chemical_list: D011868:Radioisotopes; D007726:Krypton