Susceptibility weighted imaging: differentiating between calcification and hemosiderin
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Radiologia Brasileira (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842015000200009 |
Resumo: | Objective:To present a detailed explanation on the processing of magnetic susceptibility weighted imaging (SWI), demonstrating the effects of echo time and sensitive mask on the differentiation between calcification and hemosiderin.Materials and Methods:Computed tomography and magnetic resonance (magnitude and phase) images of six patients (age range 41– 54 years; four men) were retrospectively selected. The SWI images processing was performed using the Matlab’s own routine.Results:Four out of the six patients showed calcifications at computed tomography images and their SWI images demonstrated hyperintense signal at the calcification regions. The other patients did not show any calcifications at computed tomography, and SWI revealed the presence of hemosiderin deposits with hypointense signal.Conclusion:The selection of echo time and of the mask may change all the information on SWI images, and compromise the diagnostic reliability. Amongst the possible masks, the authors highlight that the sigmoid mask allows for contrasting calcifications and hemosiderin on a single SWI image. |
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Radiologia Brasileira (Online) |
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Susceptibility weighted imaging: differentiating between calcification and hemosiderinSWIMagnetic resonance imagingMagnetic susceptibilityCalcificationHemosiderinObjective:To present a detailed explanation on the processing of magnetic susceptibility weighted imaging (SWI), demonstrating the effects of echo time and sensitive mask on the differentiation between calcification and hemosiderin.Materials and Methods:Computed tomography and magnetic resonance (magnitude and phase) images of six patients (age range 41– 54 years; four men) were retrospectively selected. The SWI images processing was performed using the Matlab’s own routine.Results:Four out of the six patients showed calcifications at computed tomography images and their SWI images demonstrated hyperintense signal at the calcification regions. The other patients did not show any calcifications at computed tomography, and SWI revealed the presence of hemosiderin deposits with hypointense signal.Conclusion:The selection of echo time and of the mask may change all the information on SWI images, and compromise the diagnostic reliability. Amongst the possible masks, the authors highlight that the sigmoid mask allows for contrasting calcifications and hemosiderin on a single SWI image.Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem2015-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842015000200009Radiologia Brasileira v.48 n.2 2015reponame:Radiologia Brasileira (Online)instname:Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)instacron:CBR10.1590/0100-3984.2014.0010info:eu-repo/semantics/openAccessBarbosa,Jeam Haroldo OliveiraSantos,Antonio CarlosSalmon,Carlos Ernesto Garridoeng2015-09-03T00:00:00Zoai:scielo:S0100-39842015000200009Revistahttps://www.scielo.br/j/rb/https://old.scielo.br/oai/scielo-oai.phpradiologiabrasileira@cbr.org.br1678-70990100-3984opendoar:2015-09-03T00:00Radiologia Brasileira (Online) - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR)false |
dc.title.none.fl_str_mv |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
title |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
spellingShingle |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin Barbosa,Jeam Haroldo Oliveira SWI Magnetic resonance imaging Magnetic susceptibility Calcification Hemosiderin |
title_short |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
title_full |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
title_fullStr |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
title_full_unstemmed |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
title_sort |
Susceptibility weighted imaging: differentiating between calcification and hemosiderin |
author |
Barbosa,Jeam Haroldo Oliveira |
author_facet |
Barbosa,Jeam Haroldo Oliveira Santos,Antonio Carlos Salmon,Carlos Ernesto Garrido |
author_role |
author |
author2 |
Santos,Antonio Carlos Salmon,Carlos Ernesto Garrido |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Barbosa,Jeam Haroldo Oliveira Santos,Antonio Carlos Salmon,Carlos Ernesto Garrido |
dc.subject.por.fl_str_mv |
SWI Magnetic resonance imaging Magnetic susceptibility Calcification Hemosiderin |
topic |
SWI Magnetic resonance imaging Magnetic susceptibility Calcification Hemosiderin |
description |
Objective:To present a detailed explanation on the processing of magnetic susceptibility weighted imaging (SWI), demonstrating the effects of echo time and sensitive mask on the differentiation between calcification and hemosiderin.Materials and Methods:Computed tomography and magnetic resonance (magnitude and phase) images of six patients (age range 41– 54 years; four men) were retrospectively selected. The SWI images processing was performed using the Matlab’s own routine.Results:Four out of the six patients showed calcifications at computed tomography images and their SWI images demonstrated hyperintense signal at the calcification regions. The other patients did not show any calcifications at computed tomography, and SWI revealed the presence of hemosiderin deposits with hypointense signal.Conclusion:The selection of echo time and of the mask may change all the information on SWI images, and compromise the diagnostic reliability. Amongst the possible masks, the authors highlight that the sigmoid mask allows for contrasting calcifications and hemosiderin on a single SWI image. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842015000200009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842015000200009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0100-3984.2014.0010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem |
publisher.none.fl_str_mv |
Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem |
dc.source.none.fl_str_mv |
Radiologia Brasileira v.48 n.2 2015 reponame:Radiologia Brasileira (Online) instname:Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR) instacron:CBR |
instname_str |
Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR) |
instacron_str |
CBR |
institution |
CBR |
reponame_str |
Radiologia Brasileira (Online) |
collection |
Radiologia Brasileira (Online) |
repository.name.fl_str_mv |
Radiologia Brasileira (Online) - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR) |
repository.mail.fl_str_mv |
radiologiabrasileira@cbr.org.br |
_version_ |
1754208938873585664 |