title: Determining the relative toxicity and RBE of internal emitters in animals.
abstract: It is almost impossible to conduct a perfect study of the relative toxicity of the radiations produced by different radionuclides. This is because the results of such studies are commonly confounded by spatial and temporal differences in the distributions of dose produced by the radionuclides employed. In addition, the results of a study designed to overcome these problems (using matched radionuclides incorporated within fused clay particles) revealed additional characteristics of an ideal study. These included the use of sufficient numbers of animals to give the study statistical power; the derivation of all causes of death and of survival for the analysis; the use of relative risk, rather than crude incidence data, to determine toxicity ratios; the cautious use of relative biological effectiveness values derived from fitted curves; and the preferred use of relative toxicity values derived directly from the data.
authors.affiliation: Radiological Protection Research and Instrumentation Branch, AECL Chalk River Laboratories, Chalk River, Ontario, K0J 1J0, Canada. priestn@aecl.ca
authors.forename: N D
authors.initials: ND
authors.lastname: Priest
authors.forename: D
authors.initials: D
authors.lastname: Hoel
mesh_terms: D000512:Alpha Particles; D000818:Animals; D001610:Beta Particles; D002132:Calcium Radioisotopes / Q000008:administration & dosage / Q000633:toxicity*; D003476:Curium / Q000008:administration & dosage / Q000633:toxicity*; D008954:Models, Biological; D009381:Neoplasms, Radiation-Induced / Q000139:chemically induced* / Q000401:mortality; D012015:Reference Standards; D012062:Relative Biological Effectiveness; D018570:Risk Assessment; D018401:Sample Size; D015996:Survival Rate
chemical_list: D002132:Calcium Radioisotopes; D003476:Curium