Metrology Repository

2. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI)

2. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI)

 

Recent Submissions

  • Ruzzarin, Anelise; Silva, Monica Aguiar Leobino da; Iwahara, Akira; Silva, Ronaldo Lins da; Trindade Filho, Octavio Luiz; Poledna, Roberto; Lopes, Ricardo Tadeu (2015)
    201Tl is used in nuclear medicine in cardiac imaging for evaluating the injury level in cardiac muscle at rest and exercise. In this work the activity concentration of a 201Tl radioactive solution has been absolutely ...
  • Kikuti, Cristina Faria; Maia, Rodrigo Seiki Inoue; Romano, Ricardo Francisco Tavares; Daros, Kellen Adriana Curci (2015)
    At DDI/UNIFESP, the abdomen and chest CT exams correspond to 38% of the exams, becoming the focus of studies. The aim of this study is to assess the relative dose using TLDs, OSLs and RF for the evaluation of the dose ...
  • 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. ...
  • 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 ...
  • Perini, Ana Paula; Neves, Lucio Pereira; Santos, William de Souza; Caldas, Linda Viola Ehlin (2015)
    Recently a special parallel-plate ionization chamber was developed and characterized at the Instituto de Pesquisas Energéticas e Nucleares. The operational tests presented results within the recommended limits. In order ...
  • 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 ...
  • Gonçalves, Paulo Eduardo; Santos, William de Souza; Belinato, Walmir; Caldas, Linda Viola Ehlin; Perini, Ana Paula; Neves, Lucio Pereira (2015)
    In this paper, various simplifications of the HDR source Varian VariSource Classic model, in which 192Ir as a radionuclide is used, were compared. These simplifications were carried out by the simulation of Monte Carlo, ...
  • Groppo, Daniela Piai; Caldas, Linda Viola Ehlin (2015)
    The optically stimulated luminescence (OSL) is widely used as a dosimetric technique for many applications. In this work, the OSL response bleaching of BeO samples was studied. The samples were irradiated using a beta ...
  • Veneziani, Glauco Rogério; Correa, Eduardo de Lima; Potiens, Maria da Penha Albuquerque; Rodrigues, Leticia Lucente Campos (2015)
    IAEA code of practice TRS-457 states that standard phantoms should offer the same primary attenuation and scatter production as relevant body section of a representative patient. Material cost, availability and dimensional ...
  • Costa, Nathalia Almeida; Potiens, Maria da Penha Albuquerque; Saraiva, Crystian (2015)
    The use of small volume ionization chamber has become required for the dosimetry of equipments that use small radiation fields. A pinpoint ionization chamber is ideal for the dosimetry of a Gamma Knife® Perfexion (GKP) ...
  • Astuto, Achilles; Patrão, Karla Cristina de Souza; Fonseca, Evaldo Simões da; Pereira, Walsan Wagner; Lopes, Ricardo Tadeu (2015)
    A new standard thermal neutron flux unit was designed in the National Ionizing Radiation Metrology Laboratory (LNMRI) for calibration of neutron detectors. Fluence is achieved by moderation of four 241Am-Be sources with ...
  • Almeida Junior, Airton Tavares de; Araújo, Fernando Gabriel da Silva; Tavares, Maria do Socorro Nogueira; Santos, Marcus Aurélio Pereira dos (2015)
    Concrete which contains water, cement and aggregate, is widely used in building construction such as medical hospitals. The CdZnTe spectrometry system was used to acquire the transmitted spectra in the RQR qualities and ...
  • Damatto, Willian Behling; Potiens, Maria da Penha Albuquerque; Vivolo, Vitor (2015)
    A set of portable meters of ionizing radiation high rates of air kerma (teletectors) commonly used in emergencies in Brazil and sent to the Calibration Laboratory of IPEN were under several tests and analyst is parameters ...
  • Sarmento, Daniele Martins; Rodrigues, Demerval Leônidas; Sanches, Matias Puga; Carneiro, Janete Cristina Gonçalves Gaburo (2015)
    This study focuses on initial radiological evaluation and the exposure situation related to the worker task in a micro-positron emission tomography/computed tomography laboratory (microPET/CT). Selected and calibrated ...
  • Silva, Natália Fiorini da; Xavier, Marcos; Vivolo, Vitor; Caldas, Linda Viola Ehlin (2015)
    As câmaras de ionização de ar livre são usadas pela maioria dos laboratórios primários como padrões primários das grandezas kerma no ar e exposição em feixes de raios X. A câmara de ionização de ar livre para baixas energias ...
  • Castro, Maysa Costa de; Xavier, Marcos; Caldas, Linda Viola Ehlin (2015)
    O uso da tomografia computadorizada (CT) tem aumentado muito ao longo dos anos gerando assim uma preocupação com as doses que são recebidas pelos pacientes submetidos a esse procedimento. Portanto, é necessário realizar ...
  • Guimarães, Margarete Cristina; Silva, Claudete Roberta Evangelista; Oliveira, Paulo Marcio Campos de; Silva, Teógenes Augusto da (2015)
    Electronic personal dosimeters (EPDs) based on solid state detectors have widely been used but some deficiencies in their response in pulsed radiation beams have been reported. Nowadays, there is not an international ...
  • Fragoso, Maria da Conceição de Farias; Oliveira, Mércia Liane de; Lima, Fernando Roberto de Andrade (2015)
    A tomografia por emissão de pósitrons (PET) está sendo cada vez mais reconhecida como uma importante ferramenta de imagem quantitativa para diagnóstico e avaliação da resposta à terapia. Como a administração correta da ...
  • Albuquerque, Marcos Aurélio Gomes de; David, Mariano Gazineu; Almeida, Carlos Eduardo de; Magalhães, Luis Alexandre Gonçalves; Peixoto, José Guilherme Pereira (2015)
    Esse trabalho mostra a metodologia usada para determinação da tensão aplicada em um tubo de raios X utilizando seus espectros. As medidas foram feitas usando um detector de Telureto de Cádmio. Antes das medidas serem ...
  • 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 ...

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