title: A simple mathematical lung model for quantitative regional ventilation measurement using 81Krm.
mesh_terms: D007726:Krypton; D008168:Lung / Q000000981:diagnostic imaging* / Q000502:physiology; D008954:Models, Biological; D009590:Nitrogen Radioisotopes; D011868:Radioisotopes; D011877:Radionuclide Imaging; D012119:Respiration
chemical_list: D009590:Nitrogen Radioisotopes; D011868:Radioisotopes; D007726:Krypton