title: Stability of gamma ray detectors and measurement of blood flow by isotope clearance.
mesh_terms: D000818:Animals; D001698:Biomedical Engineering / Q000295:instrumentation; D003201:Computers; D005720:Gamma Rays; D006801:Humans; D008433:Mathematics; D012039:Regional Blood Flow; D012588:Scintillation Counting / Q000295:instrumentation / Q000592:standards*