Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems

Detalhes bibliográficos
Autor(a) principal: Alvarez, Matheus [UNESP]
Data de Publicação: 2012
Outros Autores: Oliveira, Marcela de [UNESP], Pina, Diana Rodrigues de [UNESP], Miranda, José Ricardo de Arruda [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://www.rbfm.org.br/index.php/rbfm/article/view/171
http://hdl.handle.net/11449/140817
Resumo: The aim of this study was to compare two ways of measuring the resolution limit of radiographic systems, one subjective and one quantitative. To this end, nine images were acquired with different radiographic techniques using a pattern of bars and aluminum plates. With these images were acquired modulation transfer function (MTF) through the edge image obtained by the aluminum plate — the MTF 10% was measured on all images — and the variation of these points, which was faced with the evaluation obtained by the resolution limit of the standard bar. Although we have observed a greater variation between measurements obtained using the bar-pattern, the simplicity of this measuring technique favors the common use of the same. We concluded that, to optimize the quality control of radiographic equipment, it is suggested to measure the MTF at least in periods of time while the annual pattern of bars to be used in shorter time periods to measure changes in resolution of the system.
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spelling Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systemsComparação entre métodos subjetivos e quantitativos na medida da resolução limite de sistemas radiográficosOptimizationQuality controlRadiographyOtimizaçãoControle de qualidadeRadiografiaThe aim of this study was to compare two ways of measuring the resolution limit of radiographic systems, one subjective and one quantitative. To this end, nine images were acquired with different radiographic techniques using a pattern of bars and aluminum plates. With these images were acquired modulation transfer function (MTF) through the edge image obtained by the aluminum plate — the MTF 10% was measured on all images — and the variation of these points, which was faced with the evaluation obtained by the resolution limit of the standard bar. Although we have observed a greater variation between measurements obtained using the bar-pattern, the simplicity of this measuring technique favors the common use of the same. We concluded that, to optimize the quality control of radiographic equipment, it is suggested to measure the MTF at least in periods of time while the annual pattern of bars to be used in shorter time periods to measure changes in resolution of the system.O objetivo deste estudo foi comparar duas formas de aferição da resolução limite de sistemas radiográficos, uma subjetiva e outra quantitativa. Para tal, foram adquiridas nove imagens com diferentes técnicas radiográficas utilizando um padrão de barras e placas de alumínio. Com estas imagens, foram adquiridas a função de transferência modulada (FTM) através da imagem da borda obtida pela placa de alumínio — a FTM foi aferida 10% em todas as imagens — e a variação destes pontos — que foi confrontada com a avaliação da resolução limite obtida através do padrão de barras. Apesar de termos observado uma maior variação entre as medidas obtidas com a utilização do padrão de barras, a simplicidade de medição desta técnica favorece o uso corriqueiro da mesma. Concluí-se que, visando a otimização do controle de qualidade de equipamentos radiográficos, sugere-se fazer a medição da FTM pelo menos em períodos de tempo anuais, enquanto que o padrão de barras seja utilizado em períodos de tempo menores para a aferição de mudanças na resolução do sistema.Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Instituto de Biociências de Botucatu (IBB), Departamento de Física e Biofísica, Botucatu, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Faculdade de Medicina de Botucatu (FMB), Departamento de Doenças Tropicias e Diagnóstico por Imagem, Botucatu, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Instituto de Biociências de Botucatu (IBB), Departamento de Física e Biofísica, Botucatu, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Faculdade de Medicina de Botucatu (FMB), Departamento de Doenças Tropicias e Diagnóstico por Imagem, Botucatu, SP, BrasilUniversidade Estadual Paulista (Unesp)Alvarez, Matheus [UNESP]Oliveira, Marcela de [UNESP]Pina, Diana Rodrigues de [UNESP]Miranda, José Ricardo de Arruda [UNESP]2016-07-07T12:35:34Z2016-07-07T12:35:34Z2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article13-17application/pdfhttp://www.rbfm.org.br/index.php/rbfm/article/view/171Revista Brasileira de Física Médica, v. 6, n. 1, p. 13-17, 2012.1984-9001http://hdl.handle.net/11449/140817ISSN1984-9001-2012-06-01-13-17.pdfCurrículo Lattesreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Física Médicainfo:eu-repo/semantics/openAccess2023-10-30T06:08:36Zoai:repositorio.unesp.br:11449/140817Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-30T06:08:36Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
Comparação entre métodos subjetivos e quantitativos na medida da resolução limite de sistemas radiográficos
title Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
spellingShingle Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
Alvarez, Matheus [UNESP]
Optimization
Quality control
Radiography
Otimização
Controle de qualidade
Radiografia
title_short Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
title_full Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
title_fullStr Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
title_full_unstemmed Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
title_sort Comparison between subjective and quantitative methods for assessing the resolution limit of radiographic systems
author Alvarez, Matheus [UNESP]
author_facet Alvarez, Matheus [UNESP]
Oliveira, Marcela de [UNESP]
Pina, Diana Rodrigues de [UNESP]
Miranda, José Ricardo de Arruda [UNESP]
author_role author
author2 Oliveira, Marcela de [UNESP]
Pina, Diana Rodrigues de [UNESP]
Miranda, José Ricardo de Arruda [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Alvarez, Matheus [UNESP]
Oliveira, Marcela de [UNESP]
Pina, Diana Rodrigues de [UNESP]
Miranda, José Ricardo de Arruda [UNESP]
dc.subject.por.fl_str_mv Optimization
Quality control
Radiography
Otimização
Controle de qualidade
Radiografia
topic Optimization
Quality control
Radiography
Otimização
Controle de qualidade
Radiografia
description The aim of this study was to compare two ways of measuring the resolution limit of radiographic systems, one subjective and one quantitative. To this end, nine images were acquired with different radiographic techniques using a pattern of bars and aluminum plates. With these images were acquired modulation transfer function (MTF) through the edge image obtained by the aluminum plate — the MTF 10% was measured on all images — and the variation of these points, which was faced with the evaluation obtained by the resolution limit of the standard bar. Although we have observed a greater variation between measurements obtained using the bar-pattern, the simplicity of this measuring technique favors the common use of the same. We concluded that, to optimize the quality control of radiographic equipment, it is suggested to measure the MTF at least in periods of time while the annual pattern of bars to be used in shorter time periods to measure changes in resolution of the system.
publishDate 2012
dc.date.none.fl_str_mv 2012
2016-07-07T12:35:34Z
2016-07-07T12:35:34Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.rbfm.org.br/index.php/rbfm/article/view/171
Revista Brasileira de Física Médica, v. 6, n. 1, p. 13-17, 2012.
1984-9001
http://hdl.handle.net/11449/140817
ISSN1984-9001-2012-06-01-13-17.pdf
url http://www.rbfm.org.br/index.php/rbfm/article/view/171
http://hdl.handle.net/11449/140817
identifier_str_mv Revista Brasileira de Física Médica, v. 6, n. 1, p. 13-17, 2012.
1984-9001
ISSN1984-9001-2012-06-01-13-17.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Brasileira de Física Médica
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 13-17
application/pdf
dc.source.none.fl_str_mv Currículo Lattes
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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