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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Colégio Brasileiro de Radiologia e Diagnóstico por
Imagem
2014
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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. |
format | Online Article Text |
id | pubmed-4337120 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Colégio Brasileiro de Radiologia e Diagnóstico por
Imagem |
record_format | MEDLINE/PubMed |
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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