Study of the scattered x-ray distributions around a mammography unit
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/1393 |
Resumo: | Purpose: To measure the distribution of scattered radiation in a mammography unit for shielding design purposes. Methods and Materials: Measurements were carried out with an anthropomorphic phantom used to simulate a body from one adult patient. The dose rate for scattered radiation was recorded by placing a solid state sensor (Unfors Xi Survey Detector) every 10 degrees at 1 m distance from the FOV centre, in the axial and coronal planes of the breast. The scattered radiation distribution was treated as isodose curves, specifying the amount of radiation that will be delivered to a specific point in the room around the equipment (GE Senographe DMR). More than 50 exposures were made with a tube voltage of 30 kVp, anode-filter combination Mo/Mo and large focus. Results: In the axial plane, results show that the scattered radiation is absorbed up to 73% on the back of the anthropomorphic phantom, at the potter bucky plane height. In the coronal plane, the scattered radiation significantly increases with the angle due to backscattering effect. Assuming the direction of the incidence beam is 0 degree, results show that the scattered radiation is 86% higher at 160 degrees than at 90 degrees. Conclusion: The type of mammographic view and the patient´s body strongly influence the distribution of scattered x-ray radiation. These results can be used to improve the shielding design of a mammographic unit with less resources and less spending on shielding barriers. |
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Study of the scattered x-ray distributions around a mammography unitPurpose: To measure the distribution of scattered radiation in a mammography unit for shielding design purposes. Methods and Materials: Measurements were carried out with an anthropomorphic phantom used to simulate a body from one adult patient. The dose rate for scattered radiation was recorded by placing a solid state sensor (Unfors Xi Survey Detector) every 10 degrees at 1 m distance from the FOV centre, in the axial and coronal planes of the breast. The scattered radiation distribution was treated as isodose curves, specifying the amount of radiation that will be delivered to a specific point in the room around the equipment (GE Senographe DMR). More than 50 exposures were made with a tube voltage of 30 kVp, anode-filter combination Mo/Mo and large focus. Results: In the axial plane, results show that the scattered radiation is absorbed up to 73% on the back of the anthropomorphic phantom, at the potter bucky plane height. In the coronal plane, the scattered radiation significantly increases with the angle due to backscattering effect. Assuming the direction of the incidence beam is 0 degree, results show that the scattered radiation is 86% higher at 160 degrees than at 90 degrees. Conclusion: The type of mammographic view and the patient´s body strongly influence the distribution of scattered x-ray radiation. These results can be used to improve the shielding design of a mammographic unit with less resources and less spending on shielding barriers.European Society of RadiologySapientiaLima, PatriciaSousa, Patrick EmmanuelRodrigues, Sónia Isabel do Espírito SantoAbrantes, AntónioSilva, CarlosRibeiro, LuísDe almeida, RuiAzevedo, Kevin2012-07-04T14:27:27Z2012-03-032012-03-03T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/1393engAUT: KBA02318; RPA02320; AAB70071; LPR02149;http://dx.doi.org/10.1007/s13244-012-0158-zinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:12:16Zoai:sapientia.ualg.pt:10400.1/1393Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:55:26.731890Repositório 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 |
Study of the scattered x-ray distributions around a mammography unit |
title |
Study of the scattered x-ray distributions around a mammography unit |
spellingShingle |
Study of the scattered x-ray distributions around a mammography unit Lima, Patricia |
title_short |
Study of the scattered x-ray distributions around a mammography unit |
title_full |
Study of the scattered x-ray distributions around a mammography unit |
title_fullStr |
Study of the scattered x-ray distributions around a mammography unit |
title_full_unstemmed |
Study of the scattered x-ray distributions around a mammography unit |
title_sort |
Study of the scattered x-ray distributions around a mammography unit |
author |
Lima, Patricia |
author_facet |
Lima, Patricia Sousa, Patrick Emmanuel Rodrigues, Sónia Isabel do Espírito Santo Abrantes, António Silva, Carlos Ribeiro, Luís De almeida, Rui Azevedo, Kevin |
author_role |
author |
author2 |
Sousa, Patrick Emmanuel Rodrigues, Sónia Isabel do Espírito Santo Abrantes, António Silva, Carlos Ribeiro, Luís De almeida, Rui Azevedo, Kevin |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Lima, Patricia Sousa, Patrick Emmanuel Rodrigues, Sónia Isabel do Espírito Santo Abrantes, António Silva, Carlos Ribeiro, Luís De almeida, Rui Azevedo, Kevin |
description |
Purpose: To measure the distribution of scattered radiation in a mammography unit for shielding design purposes. Methods and Materials: Measurements were carried out with an anthropomorphic phantom used to simulate a body from one adult patient. The dose rate for scattered radiation was recorded by placing a solid state sensor (Unfors Xi Survey Detector) every 10 degrees at 1 m distance from the FOV centre, in the axial and coronal planes of the breast. The scattered radiation distribution was treated as isodose curves, specifying the amount of radiation that will be delivered to a specific point in the room around the equipment (GE Senographe DMR). More than 50 exposures were made with a tube voltage of 30 kVp, anode-filter combination Mo/Mo and large focus. Results: In the axial plane, results show that the scattered radiation is absorbed up to 73% on the back of the anthropomorphic phantom, at the potter bucky plane height. In the coronal plane, the scattered radiation significantly increases with the angle due to backscattering effect. Assuming the direction of the incidence beam is 0 degree, results show that the scattered radiation is 86% higher at 160 degrees than at 90 degrees. Conclusion: The type of mammographic view and the patient´s body strongly influence the distribution of scattered x-ray radiation. These results can be used to improve the shielding design of a mammographic unit with less resources and less spending on shielding barriers. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-07-04T14:27:27Z 2012-03-03 2012-03-03T00:00:00Z |
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://hdl.handle.net/10400.1/1393 |
url |
http://hdl.handle.net/10400.1/1393 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
AUT: KBA02318; RPA02320; AAB70071; LPR02149; http://dx.doi.org/10.1007/s13244-012-0158-z |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
European Society of Radiology |
publisher.none.fl_str_mv |
European Society of Radiology |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1799133157095636992 |