title: Krypton-81m as a flow tracer in the lung: theory and quantitation.
mesh_terms: D006801:Humans; D007726:Krypton; D008168:Lung / Q000000981:diagnostic imaging*; D008433:Mathematics; D008954:Models, Biological; D011868:Radioisotopes; D011877:Radionuclide Imaging; D012119:Respiration
chemical_list: D011868:Radioisotopes; D007726:Krypton