Magnetic resonance breast coils: models and image quality
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
DOI: | 10.25758/set.254 |
Texto Completo: | https://doi.org/10.25758/set.254 |
Resumo: | In three MRI equipment [1,5 T], we evaluated and compared 3 models of dedicated coils to breast MR Imaging. The image quality variable was quantitatively assessed by the indicators: (i) signal-to-noise ratio (SNR) and (ii) uniformity (U). The qualitative assessment by the voluntaries and Radiographers on a Likert scale, considered: (iii) comfort provided during the examination, (iv) accessibility for interventional breast procedures, (v) handling and positioning by Radiographers, (vi) single or bilateral imaging selection, (vii) guidance patient within the magnet. Three female volunteers without related breast disease representing the breast patterns of the BI-RADS system (35, 53, and 72 years old) were exanimate in all coils and underwent a SPIR (spectral inversion recovery) weighted T2 sequence. It was applied a factorial analysis of variance with five fixed factors without replicates to evaluate if there were significant differences between images, concerning the average of SNR and U in the three coils. The differences were significant with the best performance attributed to the coil Z [SNR (p-value=0, F=277,193) e U (p-value=0, F=1487,95)]. There were significant differences in the quality of the images obtained by the 3 coils (multiple comparisons Tukey test). To the coil z the values are [SNR (15,08u.a.) e U (0,58u.a.)] so, is this coil that produces the best images. The Y coil had a lesser rating in the image quality variable: (SNR values of 1.89 and U = 0.06). It was found that the draw position of the ROI (Spearman correlation) does not influence the image quality. The highest rating for comfort was given to coil X followed by coil Z. The coil model choice is important to perform high-quality images, patient comfort, and handling in positioning. The study results can contribute to a reduction in financial speculation linked to the commercial approaches of competing manufacturers on the market. |
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Magnetic resonance breast coils: models and image qualityBobinas de radiofrequência em estudos mamários por ressonância magnética: modelos e qualidade de imagemRessonância magnéticaBobina de radiofrequênciaMamaRelação sinal-ruídoUniformidadeQualidade de imagemMagnetic resonanceRadiofrequency coilBreastSNRUniformityImage qualityIn three MRI equipment [1,5 T], we evaluated and compared 3 models of dedicated coils to breast MR Imaging. The image quality variable was quantitatively assessed by the indicators: (i) signal-to-noise ratio (SNR) and (ii) uniformity (U). The qualitative assessment by the voluntaries and Radiographers on a Likert scale, considered: (iii) comfort provided during the examination, (iv) accessibility for interventional breast procedures, (v) handling and positioning by Radiographers, (vi) single or bilateral imaging selection, (vii) guidance patient within the magnet. Three female volunteers without related breast disease representing the breast patterns of the BI-RADS system (35, 53, and 72 years old) were exanimate in all coils and underwent a SPIR (spectral inversion recovery) weighted T2 sequence. It was applied a factorial analysis of variance with five fixed factors without replicates to evaluate if there were significant differences between images, concerning the average of SNR and U in the three coils. The differences were significant with the best performance attributed to the coil Z [SNR (p-value=0, F=277,193) e U (p-value=0, F=1487,95)]. There were significant differences in the quality of the images obtained by the 3 coils (multiple comparisons Tukey test). To the coil z the values are [SNR (15,08u.a.) e U (0,58u.a.)] so, is this coil that produces the best images. The Y coil had a lesser rating in the image quality variable: (SNR values of 1.89 and U = 0.06). It was found that the draw position of the ROI (Spearman correlation) does not influence the image quality. The highest rating for comfort was given to coil X followed by coil Z. The coil model choice is important to perform high-quality images, patient comfort, and handling in positioning. The study results can contribute to a reduction in financial speculation linked to the commercial approaches of competing manufacturers on the market.Em três equipamentos de Ressonância Magnética [1,5T] avaliaram-se e compararam-se 3 modelos de bobinas dedicadas para estudos mamários. A variável qualidade de imagem foi avaliada quantitativamente através dos indicadores: (i) relação entre o sinal e o ruído (SNR) e (ii) uniformidade do sinal (U). Na avaliação qualitativa consideram-se as variáveis: (iii) conforto proporcionado às voluntárias durante o exame, (iv) acessibilidade à mama para procedimentos de intervenção, (v) manipulação e posicionamento pelos Técnicos de Radiologia, (vi) possibilidade de selecção uni ou bilateral na aquisição da imagem e (vii) orientação da paciente dentro do magneto. Para a obtenção das imagens, 3 mulheres voluntárias, sem história conhecida de patologia mamária querepresentavam os padrões mamários 1, 2 e 3 da classificação BIRADS (35, 53 e 72 anos) foram submetidas a uma sequência RM utilizando-se a técnica de saturação espectral da gordura (SPIR), em ponderação T2. Procedeu-se a uma análise de variância factorial com cinco factores fixos sem réplicas e verificou-se que existiam diferenças significativas nas imagens relativamente aos valores médios da SNR e U nas três bobinas [SNR (valor-p=0, F=277,193) e U (valor-p=0, F=1487,95)]. A análise das comparações múltiplas de Tukey, permitiu verificar que existem diferenças significativas entre os valores médios da SNR e da U entre todas as combinações de pares de bobinas, sendo a bobina Z a que apresentou os valores médios da SNR e da U significativamente mais elevados [SNR (15,08u.a.) e U (0,58u.a.)] e, por isso, permitindo obter melhores imagens. Quanto à bobina X verificaram-se os valores de (SNR=4,77 e U=0,30u.a.) e para a bobina Y o SNR (2u.a.) e a U (0,06u.a). Verificou-se que a posição da ROI nos procedimentos de medida (correlação de Spearman) não influencia a qualidade da imagem (valor-p≥0 em todas as bobinas). A classificação mais elevada relativamente ao conforto foi atribuída à bobina X, seguindo-se a bobina Z. A escolha do modelo da bobina é importante para promover o aumento da qualidade das imagens, do conforto da paciente e manipulação nas manobras de posicionamento. Este estudo poderá contribuir como regulador dos aspectos financeiros e comerciais desenvolvidos entre marcas concorrentes no mercado. Escola Superior de Tecnologia da Saúde de Lisboa (Instituto Politécnico de Lisboa)2009-11-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://doi.org/10.25758/set.254https://doi.org/10.25758/set.254Saúde e Tecnologia; No. 04 (2009): Novembro 2009; 16-27Saúde & Tecnologia; N.º 04 (2009): Novembro 2009; 16-271646-9704reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPporhttps://journals.ipl.pt/stecnologia/article/view/749https://journals.ipl.pt/stecnologia/article/view/749/638Direitos de Autor (c) 2023 Saúde & Tecnologiainfo:eu-repo/semantics/openAccessCosta, Ana Margarida Dias eSilva, Juliana Filipa Pereira daRibeiro, MargaridaSilva-Fortes, Carina2023-05-12T08:30:24Zoai:journals.ipl.pt:article/749Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:42:45.603377Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Magnetic resonance breast coils: models and image quality Bobinas de radiofrequência em estudos mamários por ressonância magnética: modelos e qualidade de imagem |
title |
Magnetic resonance breast coils: models and image quality |
spellingShingle |
Magnetic resonance breast coils: models and image quality Magnetic resonance breast coils: models and image quality Costa, Ana Margarida Dias e Ressonância magnética Bobina de radiofrequência Mama Relação sinal-ruído Uniformidade Qualidade de imagem Magnetic resonance Radiofrequency coil Breast SNR Uniformity Image quality Costa, Ana Margarida Dias e Ressonância magnética Bobina de radiofrequência Mama Relação sinal-ruído Uniformidade Qualidade de imagem Magnetic resonance Radiofrequency coil Breast SNR Uniformity Image quality |
title_short |
Magnetic resonance breast coils: models and image quality |
title_full |
Magnetic resonance breast coils: models and image quality |
title_fullStr |
Magnetic resonance breast coils: models and image quality Magnetic resonance breast coils: models and image quality |
title_full_unstemmed |
Magnetic resonance breast coils: models and image quality Magnetic resonance breast coils: models and image quality |
title_sort |
Magnetic resonance breast coils: models and image quality |
author |
Costa, Ana Margarida Dias e |
author_facet |
Costa, Ana Margarida Dias e Costa, Ana Margarida Dias e Silva, Juliana Filipa Pereira da Ribeiro, Margarida Silva-Fortes, Carina Silva, Juliana Filipa Pereira da Ribeiro, Margarida Silva-Fortes, Carina |
author_role |
author |
author2 |
Silva, Juliana Filipa Pereira da Ribeiro, Margarida Silva-Fortes, Carina |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Costa, Ana Margarida Dias e Silva, Juliana Filipa Pereira da Ribeiro, Margarida Silva-Fortes, Carina |
dc.subject.por.fl_str_mv |
Ressonância magnética Bobina de radiofrequência Mama Relação sinal-ruído Uniformidade Qualidade de imagem Magnetic resonance Radiofrequency coil Breast SNR Uniformity Image quality |
topic |
Ressonância magnética Bobina de radiofrequência Mama Relação sinal-ruído Uniformidade Qualidade de imagem Magnetic resonance Radiofrequency coil Breast SNR Uniformity Image quality |
description |
In three MRI equipment [1,5 T], we evaluated and compared 3 models of dedicated coils to breast MR Imaging. The image quality variable was quantitatively assessed by the indicators: (i) signal-to-noise ratio (SNR) and (ii) uniformity (U). The qualitative assessment by the voluntaries and Radiographers on a Likert scale, considered: (iii) comfort provided during the examination, (iv) accessibility for interventional breast procedures, (v) handling and positioning by Radiographers, (vi) single or bilateral imaging selection, (vii) guidance patient within the magnet. Three female volunteers without related breast disease representing the breast patterns of the BI-RADS system (35, 53, and 72 years old) were exanimate in all coils and underwent a SPIR (spectral inversion recovery) weighted T2 sequence. It was applied a factorial analysis of variance with five fixed factors without replicates to evaluate if there were significant differences between images, concerning the average of SNR and U in the three coils. The differences were significant with the best performance attributed to the coil Z [SNR (p-value=0, F=277,193) e U (p-value=0, F=1487,95)]. There were significant differences in the quality of the images obtained by the 3 coils (multiple comparisons Tukey test). To the coil z the values are [SNR (15,08u.a.) e U (0,58u.a.)] so, is this coil that produces the best images. The Y coil had a lesser rating in the image quality variable: (SNR values of 1.89 and U = 0.06). It was found that the draw position of the ROI (Spearman correlation) does not influence the image quality. The highest rating for comfort was given to coil X followed by coil Z. The coil model choice is important to perform high-quality images, patient comfort, and handling in positioning. The study results can contribute to a reduction in financial speculation linked to the commercial approaches of competing manufacturers on the market. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-11-15 |
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 |
https://doi.org/10.25758/set.254 https://doi.org/10.25758/set.254 |
url |
https://doi.org/10.25758/set.254 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://journals.ipl.pt/stecnologia/article/view/749 https://journals.ipl.pt/stecnologia/article/view/749/638 |
dc.rights.driver.fl_str_mv |
Direitos de Autor (c) 2023 Saúde & Tecnologia info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Direitos de Autor (c) 2023 Saúde & Tecnologia |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Escola Superior de Tecnologia da Saúde de Lisboa (Instituto Politécnico de Lisboa) |
publisher.none.fl_str_mv |
Escola Superior de Tecnologia da Saúde de Lisboa (Instituto Politécnico de Lisboa) |
dc.source.none.fl_str_mv |
Saúde e Tecnologia; No. 04 (2009): Novembro 2009; 16-27 Saúde & Tecnologia; N.º 04 (2009): Novembro 2009; 16-27 1646-9704 reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
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1822228303652585472 |
dc.identifier.doi.none.fl_str_mv |
10.25758/set.254 |