title: Letter: Theoretical basis for regional blood flow measurement by use of the ratio of 81Rb: 81mKr.
mesh_terms: D007726:Krypton; D011868:Radioisotopes; D012039:Regional Blood Flow; D012413:Rubidium
chemical_list: D011868:Radioisotopes; D007726:Krypton; D012413:Rubidium