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Correa R.S.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Freitas-Junior R.,Federal University of Goais | Peixoto J.E.,Instituto Nacional Of Cancer | Rodrigues D.C.N.,Federal University of Goais | And 4 more authors.
Revista de Saude Publica | Year: 2012

Objective: To assess the effectiveness of a quality control program in mammography services of the Brazilian National Health System (SUS). Methods: A prospective study using temporal analysis of a health surveillance action was conducted. A total of 35 service providers that had mammography equipment in operation and regularly performed exams between 2007 and 2009 in the state of Goiás, Central-Western Brazil, participated in this study. Services were assessed during three site visits by performance testing of mammography equipment, film processors, and other materials, and image quality and entrance surface dose in a phantom were also assessed. Each service was scored according to the percentage of tests that conformed to standards. Results: The mean percentage for compliance among the participating service providers were 64.1% (±13.3%) in the first visit, 68.4% (± 15.9%) in the second, and 77.1% (± 13.3%) in the third (p < 0.001). The main improvements resulted from adjustments to the breast compression force, the automatic exposure control system, and the alignment of the compression paddle. The doses measured were within the conformity range in 80% of the services assessed. Conclusions: The implementation of this program in the mammography services was effective at improving the operational parameters of the mammography machines, although 40% of the services did not reach the acceptable level of 70%. This result indicates the need to continue this health surveillance action. Source


Mingote R.M.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Nogueira R.A.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO)
Journal of Environmental Radioactivity | Year: 2016

A survey of 210Pb activity concentration, one of the major internal natural radiation sources to man, has been carried in the most common species of beans (Phaseolus vulgaris L.) grown and consumed in Brazil. The representative bean types chosen, Carioca beans and black type sown in the Brazilian Midwestern and Southern regions, have been collected in this study and 210Pb determined by liquid scintillation spectrometry after separation with chromatographic extraction using Sr-resin. Available values in data set of radioactivity in Brazil (GEORAD) on the 210Pb activity concentration in black beans grown in Southeastern region have been added to the results of this study with the purpose of to amplify the population considered. Concerning the multiple detection limits and due to the high level of censored observations, a robust semi-parametric statistical method called regression on order statistics (ROS) has been employed to provide a reference value of the 210Pb in Brazilian beans, which amounted to 41 mBq kg-1 fresh wt. The results suggest that the 210Pb activity concentration in carioca beans is lower than in black beans. Also evaluated was the 210Pb activity concentration in vegetable component of a typical diet, which displays lower values than those shown in the literature for food consumed in Europe. © 2016 Elsevier Ltd. Source


Ribeiro E.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Tauhata L.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Tauhata L.,Brazilian National Nuclear Energy Commission | Eugenia dos Santos E.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | da Silveira Correa R.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO)
Journal of Environmental Radioactivity | Year: 2011

This paper presents the results of the Environmental Monitoring Program for the Radioactive waste repository of Abadia de Goiás, which was originated from the accident of Goiania, conducted by the Regional Center of Nuclear Sciences (CRCN-CO) of the National Commission on Nuclear Energy (CNEN), from 1998 to 2008.The results are related to the determination of 137Cs activity per unit of mass or volume of samples from surface water, ground water, depth sediments of the river, soil and vegetation, and also the air-kerma rate estimation for gamma exposure in the monitored site.In the phase of operational Environmental Monitoring Program, the values of the geometric mean and standard deviation obtained for 137Cs activity per unit of mass or volume in the analyzed samples were (0.08 ± 1.16) Bq.L-1 for surface and underground water, (0.22 ± 2.79) Bq.kg-1 for soil, and (0.19 ± 2.72) Bq.kg-1 for sediment, and (0.19 ± 2.30) Bq.kg-1 for vegetation. These results were similar to the values of the pre-operational Environmental Monitoring Program.With these data, estimations for effective dose were evaluated for public individuals in the neighborhood of the waste repository, considering the main possible way of exposure of this population group.The annual effective dose obtained from the analysis of these results were lower than 0.3 mSv.y-1, which is the limit established by CNEN for environmental impact in the public individuals indicating that the facility is operating safely, without any radiological impact to the surrounding environment. © 2010 Elsevier Ltd. Source


da Silveira Correa R.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | da Silveira Correa R.,Federal University of Goais | Freitas-Junior R.,Federal University of Goais | Peixoto J.E.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | And 5 more authors.
Cadernos de Saude Publica | Year: 2011

This cross-sectional study aimed to estimate mammogram coverage in the State of Goiás, Brazil, describing the supply, demand, and variations in different age groups, evaluating 98 mammography services as observational units. We estimated the mammogram rates by age group and type of health service, as well as the number of tests required to cover 70% and 100% of the target population. We assessed the association between mammograms, geographical distribution of mammography machines, type of service, and age group. Full coverage estimates, considering 100% of women in the 40-69 and 50-69-year age brackets, were 61% and 66%, of which the Brazilian Unified National Health System provided 13% and 14%, respectively. To achieve 70% coverage, 43,424 additional mammograms would be needed. All the associations showed statistically significant differences (p < 0.001). We conclude that mammogram coverage is unevenly distributed in the State of Goiás and that fewer tests are performed than required. Source


Mingote R.M.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Nogueira R.A.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO) | Ribeiro E.,Brazilian Central-West Regional Center of Nuclear Science (CRCN-CO)
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013

The consumption of beans constitutes an important dietary habit in many Latin American, Asian and African countries. Carioca beans and the black type stand out among the many consumed common beans in Brazil. 40K was used as a natural radiotracer to evaluate the influence of the season growing and the bean type in the potassium content into grain. The activity concentrations of 40K and 137Cs were evaluated on samples of beans by γ-ray spectrometry. 137Cs was less than 1.3 Bq kg -1. The highest potassium content in the grain were observed in the dry and winter seasons. The black beans showed higher potassium content than the carioca type. The potassium levels were compared with that of beans grown and consumed in other regions of the world. A method to estimate the bean consumption rates in Brazil independently of the location of the meal is proposed. The ingestion of common beans was estimated in 14.6 kg year -1 per person. The two regions with the highest consumption are the Southeast (19.2 kg year-1) and the Middle West (18.7 kg year -1), whose account for about 60 % of the intake of common beans is related to consumption out home. © 2013 Akadémiai Kiadó, Budapest, Hungary. Source

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