title: Pulmonary function and 81mKr scans in obstructive pulmonary disease.
mesh_terms: D000328:Adult; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D007726:Krypton; D008168:Lung / Q000000981:diagnostic imaging / Q000502:physiology; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011868:Radioisotopes; D012129:Respiratory Function Tests / Q000379:methods*; D014055:Tomography, Emission-Computed / Q000379:methods
chemical_list: D011868:Radioisotopes; D007726:Krypton