title: 81mKr ventilation scan and pulmonary function tests.
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007726:Krypton; D008171:Lung Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging; D013902:Radiography, Thoracic; D011868:Radioisotopes; D011877:Radionuclide Imaging; D012119:Respiration; D012129:Respiratory Function Tests / Q000379:methods*
chemical_list: D011868:Radioisotopes; D007726:Krypton