title: [Regional distribution of ventilation-perfusion ratio in patients with interstitial pneumonia using Kr-81m].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007726:Krypton; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011868:Radioisotopes; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio
chemical_list: D011868:Radioisotopes; D007726:Krypton