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Browsing Metrologia das radiações ionizantes: Produção Científica by Title

Browsing Metrologia das radiações ionizantes: Produção Científica by Title

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  • Balthar, Mario Cesar Viegas; Amorim, Aneuri de; Santos, Avelino dos; Vilela, Paulo Ricardo T. de; Oliveira, Luciano Santa Rita; Penha, Paulo Eduardo C. De Oliveira; Gonzaga, Roberto Neves; Andrade, Edson Ramos de; Fagundes, Luiz Cesar S.; Vieira, Fábio Gomes; Cardoso, Domingos D’Oliveira; Izidório, Ana Carolina dos Anjos da Cruz; Silva, Thiago de Medeiros Silveira (2017)
    O presente trabalho tem como objetivo apresentar as etapas de implantação e de adequação do Laboratório de Calibração de Monitores Gama (LABCAL) do Instituto de Defesa Química, Biológica, Radiológica e Nuclear (IDQBRN) do ...
  • Kuahara, Lilian Toshie; Correa, Eduardo de Lima; Potiens, Maria da Penha Albuquerque (2015)
    The activimeter, instrument used in radionuclide activity measurement, consists primarily of a well type ionization chamber coupled to a special electronic device. Its response, after calibration, is shown in activity units ...
  • Navarro, Marcus Vinícius Teixeira; Navarro, Valéria Coêlho Costa; Garcia, Igor Fernando Modesto; Ferreira, Mário de Jesus; Macedo, E. M. (2015)
    Além de ser obrigatório, o levantamento radiométrico continua sendo uma necessidade devido a construção de salas cada vez menores, podendo as condições de calibração, a instrumentação e seu uso, produzirem fatores subestimados. ...
  • Correa, Eduardo de Lima; Santos, Lucas Rodrigues dos; Vivolo, Vitor; Potiens, Maria da Penha Albuquerque (2015)
    In this study the mammography calibration qualities were established in a clinical mammography system. The objective is to provide the IPEN instruments calibration laboratory with both mammography calibration methods (using ...
  • Freitas, Bruno Mendes; Martins, Marcelo Marques; Silva, Ademir Xavier da; Mauricio, Claudia Lucia de Pinho (2015)
    The IRD TLD albedo dosemeter measures both incident and albedo neutron component. The incident to albedo ratio is used to take into account the energy dependence of its response. In this paper, the behavior of the IRD ...
  • Silva, Ronaldo Lins da; Almeida, Maria Candida Moreira de; Delgado, José Ubiratan; Poledna, Roberto; Santos, A.; Veras, E. V.; Rangel, J.; Trindade, O. L. (2015)
    The National Laboratory for Metrology of Ionizing Radiation provides gamma sources of radionuclide and standardized in activity with reduced uncertainties. Relative methods require standards to determine the sample activity ...
  • Santos, Anderson Ricardo Leiras dos; Silva, Carlos José da; Delgado, José Ubiratan; Tavares, Desiree Yael de Sena; Silva, Ronaldo L. da; Poledna, Roberto; Iwahara, Akira (2017)
    Uma solução de 65Zn foi padronizada usando o método absoluto de contagem em anticoincidência 4πβ(LS)-γ(NaI) e técnica de extrapolação de eficiência beta pelo Laboratório Nacional de Metrologia das Radiações Ionizantes no ...
  • Tauhata, Luiz; Vianna, Maria Elizabeth Couto Machado; Oliveira, Antonio Eduardo de; Bragança, Maura Julia Câmara da Silva; Ferreira, Ana Cristina de Melo (2015)
    The statistical evaluation of the data of 23 years of the Brazilian Intercomparison Program shows the performance of the 24 Participant Laboratories of the country in the determination of 29 radionuclides in 10600 spiked ...
  • Dantas, Bernardo Maranhão; Lucena, Eder Augusto de; Dantas, Ana Letícia Almeida (2017)
    In vivo monitoring of 131I in human thyroid is often used to evaluate occupational exposure in nuclear medicine facilities and in the case of accidental intakes in nuclear power plants for the monitoring of workers and ...
  • Caldas, Linda Viola Ehlin; Costa, Jhonatha Junio Lopes; Oliveira, Lucas Nonato de; Nascimento, Eriberto Oliveira do (2017)
    In this work, twenty five points located on the ground floor of the Federal Institute of Education, Science and Technology of Goias - IFG - Campus Goiania, were analyzed in morning periods of two Saturdays. The pressure ...
  • Ruzzarin, Anelise; Cruz, Paulo Alberto Lima da; Ferreira Filho, Alfredo Lopes; Iwahara, Akira (2017)
    The 4πβ-γ coincidence counting and CIEMAT/NIST liquid scintillation method were used in the standardization of a solution of 152Eu. In CIEMAT/NIST method, measurements were performed in a Liquid Scintillation Counter model ...
  • Quaresma, Daniel da Silva; Cardoso, Ricardo de Souza; Peixoto, José Guilherme Pereira (2015)
    The operational facility procedures in diagnostic radiology standardization and calibration, through the relation between the X ray tube current and the ionization chamber current in a radiation quality Q, shown the reference ...
  • Guimarães, Margarete Cristina; Silva, Claudete Roberta Evangelista Silva; Rosado, Paulo Henrique G.; Cunha, Paulo Gonçalves; Silva, Teogenes Augusto da (2017)
    Metrology laboratories are expected to maintain standardized radiation beams and traceable standard dosimeters to provide reliable calibrations or testing of detectors. Results of the characterization of an x-ray system ...
  • Feital, João Carlos da Silva; Delgado, José Ubiratan; Peixoto, José Guilherme Pereira; Lopes, Ricardo Tadeu (2015)
    Female breast is a radiosensitive organ and the main procedure to assess the carcinogenic risk associated the mammographic practices has been indicated by the mean glandular dose (MGD) measurements. However, this dosimetric ...
  • Albuquerque, Marcos Aurélio Gomes de; David, Mariano Gazineu; Almeida, Carlos Eduardo de; Bernal, Mario; Magalhães, Luis Alexandre Gonçalves; Braz, Delson (2015)
    O câncer de mama é o tipo de neoplasia mais freqüente entre mulheres. A principal técnica de detecção precoce do câncer de mama é a mamografia. Apesar do avanço da diminuição das mortes por câncer, existe a preocupação dos ...
  • Souza, Felipe Marques Lucas de; Gonçalves, Odair Dias; Batista, Delano Valdivino Santos; Coutinho, Simone Cardoso (2017)
    This study aims to analyze the eye’s movement during radiotherapy treatment for choroidal melanoma, as well as the methodology used in the repositioning of the patient between treatments sessions. For this purpose, the ...
  • Trindade Filho, Octavio Luiz; Conceição, Dayana Azeredo da; Oliveira, Antonio Eduardo de; Delgado, José Ubiratan; Iwahara, Akira; Silva, Carlos José da; Tauhata, Luiz (2017)
    Ionization chambers are used as secondary standard in order to maintain the calibration factors of radionuclides in the activity measurements in metrology laboratories. Used as radionuclide calibrator in nuclear medicine ...
  • Cruz, Paulo Alberto Lima da; Silva, Carlos José da; Iwahara, Akira; Loureiro, Jamir dos Santos; Oliveira, Antônio Eduardo de; Tauhata, Luiz; Lopes, Ricardo Tadeu (2015)
    In this work are presented TDCR and CIEMAT/NIST methods of liquid scintillation implemented in National Institutes of Metrology for activity standardization of radionuclides which decay by beta emission and electron capture. ...
  • Jordão, Bruno de Oliveira; Peixoto, José Guilherme Pereira; Quaresma, Daniel da Silva (2017)
    The area of metrology has taken a step forward with regard to the calculation of uncertainty. This mathematical tool used in laboratories is essential to ensure that the values resulting from a measurement are reliable. ...
  • Perini, Ana Paula; Mendonça, Dalila Souza Costa; Neves, Lucio Pereira; Santos, William de Souza; Caldas, Linda Viola Ehlin (2017)
    Câmaras de ionização são muito utilizadas para dosimetria de feixes de radiodiagnóstico. Neste trabalho uma câmara de ionização tipo lápis especial, com dimensões, configuração e materiais diferentes em relação às câmaras ...

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