Improvement of the WBC calibration of the Internal Dosimetry Laboratory of the CDTN/CNEN using the physical phantom BOMAB and MCNPX code

Paiva, Fernanda Guerra; Oliveira, Arno Heeren de; Mendes, Bruno Melo; Pinto, Jacqueline Rosária; Filho, Nelson do Nascimento A.; Dantas, Bernardo Maranhão; Dantas, Ana Letícia Almeida; Silva, Teógenes Augusto da; Lacerda, Marco Aurélio de Sousa; Fonseca, Telma Cristina Ferreira

doi:10.1016/j.apradiso.2015.12.059

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…Modeling individual detectors and instituting regular efficiency evaluations provides an opportunity for tracking the performance of system components more thoroughly than overall system QC testing. The fairly large number of NaI(Tl) detectors in our WBC may necessitate this type of detailed testing, as many other WBC systems make use of fewer detectors (Krstic and Nikezic 2012, Paiva et al 2016, Bhati et al 2012. It may be easier to isolate and identify problems within these simpler systems, but it seems reasonable to assume that more detailed performance evaluations would benefit them as well.…”

Section: Discussionmentioning

confidence: 99%

Longitudinal monitoring of whole body counter NaI(Tl) detector efficiency

Shypailo

2017

Applied Radiation and Isotopes

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Assessing accuracy of radiation counting systems over time is critical. We examined long-term WBC performance in detail. Efficiency factors for 54 detectors were updated annually over several years. Newer efficiency values were compared with baseline and with annual values. Overall system efficiency has declined (-1.9% over 3 yrs) and appears to be doing so at an increasing rate. Having more specific performance data on individual components can make the process of system maintenance and repair more straightforward and efficient.

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Section: Discussionmentioning

confidence: 99%

Longitudinal monitoring of whole body counter NaI(Tl) detector efficiency

Shypailo

2017

Applied Radiation and Isotopes

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“…In this experiment, the phantom was filled with a potassium chloride solution (KCl) and placed on the bed of thet WBC system. Eight measurements at different positions along the horizontal axis were performed and the highest detector efficiency was obtained when the detector is positioned at a specific coordinate located over the torso of the phantom [10].…”

Section: Methodsmentioning

confidence: 99%

Calibration of the LDI/CDTN Whole Body Counter us-ing two physical phantoms

Paiva¹,

Mendes²,

Lacerda³

et al. 2017

Braz. J. Rad. Sci.

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“…The Internal Dosimetry Laboratory of the Nuclear Technology Development Center (LDI/CDTN) located in Belo Horizonte -MG, Brazil is contamination of workers of the Research and Production of Radiopharmaceuticals Unit (UPPR/ CDTN) involved in the production of 18 F-FDG. Studies with phantoms have already been performed for the calibration of the internal contamination monitoring system with 18 F-FDG (9)(10)(11)(12), these simulators are used to obtain the calibration coefficient (CC). The CC is one of the most important parameters to calculate the activity present in the sample.…”

Section: Introductionmentioning

confidence: 99%

Comparação entre diferentes metodologias para a determinação da atividade mínima detectável dos sistemas de dosimetria interna in vivo

Vital

Mendes²,

Silva³

et al. 2022

Rev Bras Fis Med

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A atividade mínima detectável (AMD) representa o valor mínimo de atividade que é detectada em um sistema de monotoração. Existem diversas metodologias que podem ser utilizadas para calcular a AMD, no entanto os resultados para cada uma destas podem ser divergentes. Laboratórios de dosimetria interna in vivo devem dispor deste parâmetro para cada tipo de geometria de contagem, bem como, para cada tipo de radionuclídeo de interesse, visando a otimização do processo de monitoração interna. O objetivo deste trabalho foi comparar três tipos de metodologias de cálculo utilizadas na determinação da AMD com os resultados obtidos experimentalmente. As metodologias de cálculo utilizadas foram as sugeridas por Currie (1968), a publicada em Health Physics Society N13.30 (1996) e a ISO 11929 (2018). A monitoração de um phantom de cabeça contendo na região correspondente ao cérebro 18F-FDG foi realizada para a obtenção da AMD experimental. Os resultados obtidos para os valores de AMDs utilizando as três diferentes metodologias apresentaram diferenças de acordo com as faixas de atividades analisadas. As incertezas do fator de calibração e Background do sistema são os principais parâmetros entre as três metodologias de cálculo que influenciaram nos resultados obtidos.

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Improvement of the WBC calibration of the Internal Dosimetry Laboratory of the CDTN/CNEN using the physical phantom BOMAB and MCNPX code

Cited by 11 publications

References 5 publications

Longitudinal monitoring of whole body counter NaI(Tl) detector efficiency

Longitudinal monitoring of whole body counter NaI(Tl) detector efficiency

Calibration of the LDI/CDTN Whole Body Counter us-ing two physical phantoms

Comparação entre diferentes metodologias para a determinação da atividade mínima detectável dos sistemas de dosimetria interna in vivo

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