title: A system for simultaneous measurement of arterial and venous concentrations of radioactive substances.
mesh_terms: D000818:Animals; D001012:Aorta, Abdominal; D001769:Blood; D002404:Catheterization; D004285:Dogs; D008722:Methods; D011868:Radioisotopes; D012082:Renal Veins
chemical_list: D011868:Radioisotopes