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Characterization of a lead breast shielding for dose reduction in computed tomography

OBJECTIVE: Several studies have been published regarding the use of bismuth shielding to protect the breast in computed tomography (CT) scans and, up to the writing of this article, only one publication about barium shielding was found. The present study was aimed at characterizing, for the first ti...

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Autores principales: Correia, Paula Duarte, Granzotti, Cristiano Roberto Fabri, Santos, Yago da Silva, Brochi, Marco Aurelio Corte, de Azevedo-Marques, Paulo Mazzoncini
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Colégio Brasileiro de Radiologia e Diagnóstico por Imagem 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337120/
https://www.ncbi.nlm.nih.gov/pubmed/25741089
http://dx.doi.org/10.1590/0100-3984.2013.1861
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author Correia, Paula Duarte
Granzotti, Cristiano Roberto Fabri
Santos, Yago da Silva
Brochi, Marco Aurelio Corte
de Azevedo-Marques, Paulo Mazzoncini
author_facet Correia, Paula Duarte
Granzotti, Cristiano Roberto Fabri
Santos, Yago da Silva
Brochi, Marco Aurelio Corte
de Azevedo-Marques, Paulo Mazzoncini
author_sort Correia, Paula Duarte
collection PubMed
description OBJECTIVE: Several studies have been published regarding the use of bismuth shielding to protect the breast in computed tomography (CT) scans and, up to the writing of this article, only one publication about barium shielding was found. The present study was aimed at characterizing, for the first time, a lead breast shielding. MATERIALS AND METHODS: The percentage dose reduction and the influence of the shielding on quantitative imaging parameters were evaluated. Dose measurements were made on a CT equipment with the aid of specific phantoms and radiation detectors. A processing software assisted in the qualitative analysis evaluating variations in average CT number and noise on images. RESULTS: The authors observed a reduction in entrance dose by 30% and in CTDI(vol) by 17%. In all measurements, in agreement with studies in the literature, the utilization of cotton fiber as spacer object reduced significantly the presence of artifacts on the images. All the measurements demonstrated increase in the average CT number and noise on the images with the presence of the shielding. CONCLUSION: As expected, the data observed with the use of lead shielding were of the same order as those found in the literature about bismuth shielding.
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spelling pubmed-43371202015-03-04 Characterization of a lead breast shielding for dose reduction in computed tomography Correia, Paula Duarte Granzotti, Cristiano Roberto Fabri Santos, Yago da Silva Brochi, Marco Aurelio Corte de Azevedo-Marques, Paulo Mazzoncini Radiol Bras Original Articles OBJECTIVE: Several studies have been published regarding the use of bismuth shielding to protect the breast in computed tomography (CT) scans and, up to the writing of this article, only one publication about barium shielding was found. The present study was aimed at characterizing, for the first time, a lead breast shielding. MATERIALS AND METHODS: The percentage dose reduction and the influence of the shielding on quantitative imaging parameters were evaluated. Dose measurements were made on a CT equipment with the aid of specific phantoms and radiation detectors. A processing software assisted in the qualitative analysis evaluating variations in average CT number and noise on images. RESULTS: The authors observed a reduction in entrance dose by 30% and in CTDI(vol) by 17%. In all measurements, in agreement with studies in the literature, the utilization of cotton fiber as spacer object reduced significantly the presence of artifacts on the images. All the measurements demonstrated increase in the average CT number and noise on the images with the presence of the shielding. CONCLUSION: As expected, the data observed with the use of lead shielding were of the same order as those found in the literature about bismuth shielding. Colégio Brasileiro de Radiologia e Diagnóstico por Imagem 2014 /pmc/articles/PMC4337120/ /pubmed/25741089 http://dx.doi.org/10.1590/0100-3984.2013.1861 Text en © Colégio Brasileiro de Radiologia e Diagnóstico por Imagem http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Articles
Correia, Paula Duarte
Granzotti, Cristiano Roberto Fabri
Santos, Yago da Silva
Brochi, Marco Aurelio Corte
de Azevedo-Marques, Paulo Mazzoncini
Characterization of a lead breast shielding for dose reduction in computed tomography
title Characterization of a lead breast shielding for dose reduction in computed tomography
title_full Characterization of a lead breast shielding for dose reduction in computed tomography
title_fullStr Characterization of a lead breast shielding for dose reduction in computed tomography
title_full_unstemmed Characterization of a lead breast shielding for dose reduction in computed tomography
title_short Characterization of a lead breast shielding for dose reduction in computed tomography
title_sort characterization of a lead breast shielding for dose reduction in computed tomography
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337120/
https://www.ncbi.nlm.nih.gov/pubmed/25741089
http://dx.doi.org/10.1590/0100-3984.2013.1861
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