RESUMO
In an attempt to estimate the effective collective dose imparted to the population of Camagüey-Ciego de Avila territory, Cuba, we have made use of the statistics from nuclear medicine examinations given to a population of 1.1 million inhabitants for the years 1995-1999. The average annual frequency of examinations was estimated to be 3.82 per 1000 population. The results show that nuclear medicine techniques of thyroid imaging with 43.73% and thyroid uptake with 43.36% are the main techniques implicated in the relative contribution to the total annual effective collective dose, which averaged 54.43 man Sv for the studied period. Radiation risks for the Camagüey-Ciego de Avila population caused by nuclear medicine examinations in the period studied were calculated: the total number of fatal and non-fatal cancers was 16.33 and the number of serious hereditary disturbance was 3.54 as a result of 21,073 nuclear medicine procedures, corresponding to a total detriment of one case per thousand examinations.
Assuntos
Neoplasias Induzidas por Radiação/mortalidade , Medicina Nuclear/estatística & dados numéricos , Radiometria/estatística & dados numéricos , Cintilografia/estatística & dados numéricos , Eficiência Biológica Relativa , Medição de Risco/métodos , Carga Corporal (Radioterapia) , Cuba/epidemiologia , Feminino , Humanos , Incidência , Masculino , Especificidade de Órgãos , Doses de Radiação , Fatores de RiscoRESUMO
The natural radioactivity of some building materials commonly used in Cuba was measured by gamma spectrometry. Typical concentrations encountered so far encountered are in the ranges: 47-2511 Bq kg(-1) for (40)K; 9-71 Bq kg(-1) for (226)Ra; and 2-38 Bq kg(-1) for (232)Th. The external gamma ray absorbed doses in indoor air and the corresponding effective dose-equivalents in a typical dwelling are presented in this paper.