UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL
Ano de defesa: | 2023 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso embargado |
Idioma: | por |
Instituição de defesa: |
Universidade Franciscana
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Nanociências
|
Departamento: |
Biociências e Nanomateriais
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/1217 |
Resumo: | Conventional radiological equipment employed in medicine uses radiation beam attenuation filters to eliminate, or at least reduce, low energy photons. The filters used are generally made of aluminum (Al) with different thicknesses, usually from 1 to 3 mm. The aluminum filter is an essential accessory for the quality of the beam used in medical radiology. The low energy photons that are part of the radiation beam emitted by the X ray tube do not contribute to the formation of the radiological image. In fact, they only increase the dose received by the patient since the low energy photons are absorbed by the superficial tissues, and do not reach the image receptor. Current standards require that all equipment used in medical radiology should have minimum filtration that varies according to specific area. In this study, we added an aluminum filter coated with a biopolimer nanocomposite to the x-ray tube on its external part. For this experiment, we used a nanomaterial formed by aluminum nitrate and sodium hydroxide forming an aluminum hydroxide solution that was structured with chitosan. The nanocomposites were characterized through scanning electron microscopy and X-ray Energy Dispersive Spectroscopy. The aluminum filter coated with the nanocomposite was exposed to x-radiation in conventional radiology equipment using variable voltage exposure factors and the beam attenuation was measured using a radiation detector for different electrical factors selected on the control panel of radiographic equipment. The voltage values were increased in constants of 10 , while the values of electric current by the exposure time (milliamperage per second - mAs) remained fixed. The obtained results showed that the values of the semi reducing layer reduced when we used low energies and remained unchanged when high energies were selected on the control panel. The reduction observed for the semi reducing layer is extremely relevant since it implies an increase in the attenuation of the radiation bean. In addition, from the X-ray images which were analyzed using a digital image visualization software, it was possible to observe that the addition of nanocomposites to the aluminum filter reduces the noise in the images without changing their quality. The noise value found when using the nanocomposites decreased from 15 to 20% in relation to the noise value found in the image without additional filtration. Moreover, we observed an increase in the signal-to-noise ratio, which means an improvement in image quality when we used low energies. These findings suggest that these nanocomposites can be used in radiation beam quality control tests and with the possibility of application in the radiological area. |
id |
UFN-1_84e5d9eb0d08dcd022fd8e0da3ef962c |
---|---|
oai_identifier_str |
oai:tede.universidadefranciscana.edu.br:UFN-BDTD/1217 |
network_acronym_str |
UFN-1 |
network_name_str |
Repositório Institucional Universidade Franciscana |
repository_id_str |
|
spelling |
Santos , Claudia Lange dosRhoden, Cristiano Rodrigo BohnKunzel , RoseliMartins, Mirkos OrtizIbaldo, Juliano Martinuzzi2023-12-19T19:50:18Z2024-08-102023-05-31Ibaldo, Juliano Martinuzzi. UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL. 2023. 57f. Dissertação( Programa de Pós-Graduação em Nanociências) - Universidade Franciscana, Santa Maria - RS.http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/1217Conventional radiological equipment employed in medicine uses radiation beam attenuation filters to eliminate, or at least reduce, low energy photons. The filters used are generally made of aluminum (Al) with different thicknesses, usually from 1 to 3 mm. The aluminum filter is an essential accessory for the quality of the beam used in medical radiology. The low energy photons that are part of the radiation beam emitted by the X ray tube do not contribute to the formation of the radiological image. In fact, they only increase the dose received by the patient since the low energy photons are absorbed by the superficial tissues, and do not reach the image receptor. Current standards require that all equipment used in medical radiology should have minimum filtration that varies according to specific area. In this study, we added an aluminum filter coated with a biopolimer nanocomposite to the x-ray tube on its external part. For this experiment, we used a nanomaterial formed by aluminum nitrate and sodium hydroxide forming an aluminum hydroxide solution that was structured with chitosan. The nanocomposites were characterized through scanning electron microscopy and X-ray Energy Dispersive Spectroscopy. The aluminum filter coated with the nanocomposite was exposed to x-radiation in conventional radiology equipment using variable voltage exposure factors and the beam attenuation was measured using a radiation detector for different electrical factors selected on the control panel of radiographic equipment. The voltage values were increased in constants of 10 , while the values of electric current by the exposure time (milliamperage per second - mAs) remained fixed. The obtained results showed that the values of the semi reducing layer reduced when we used low energies and remained unchanged when high energies were selected on the control panel. The reduction observed for the semi reducing layer is extremely relevant since it implies an increase in the attenuation of the radiation bean. In addition, from the X-ray images which were analyzed using a digital image visualization software, it was possible to observe that the addition of nanocomposites to the aluminum filter reduces the noise in the images without changing their quality. The noise value found when using the nanocomposites decreased from 15 to 20% in relation to the noise value found in the image without additional filtration. Moreover, we observed an increase in the signal-to-noise ratio, which means an improvement in image quality when we used low energies. These findings suggest that these nanocomposites can be used in radiation beam quality control tests and with the possibility of application in the radiological area.Os equipamentos radiológicos convencionais que são usados na medicina utilizam filtros de atenuação do feixe de radiação para eliminar, ou ao menos diminuir, os fótons de baixa energia. Os filtros utilizados são, geralmente, feitos de alumínio (Al) em espessuras variadas, geralmente de 1 a 3 mm. O filtro de alumínio é um acessório essencial para a qualidade do feixe utilizado na radiologia médica. Os fótons de baixa energia que fazem parte do feixe de radiação emitido pelo tubo de raios X não contribuem para a formação da imagem radiológica. Na verdade, eles apenas aumentam a dose de radiação recebida pelo paciente pois os fótons de baixa energia são absorvidos pelos tecidos superficiais, e não atingem o receptor de imagem. As normatizações vigentes, exigem que todo o equipamento radiográfico utilizado na área médica tenha filtração mínima, que varia de acordo com a modalidade diagnóstica empregada. Neste estudo, adicionamos na saída do tubo de raios X, um filtro de alumínio recoberto com um nanocompósito biopolimérico. Para este experimento, utilizamos um nanomaterial formado por nitrato de alumínio e hidróxido de sódio formando uma solução de hidróxido de alumínio que foi estruturado com quitosana. Os nanocompósitos foram caracterizados por microscopia eletrônica de varredura e espectroscopia por energia dispersiva de raios X. O filtro de alumínio recoberto com o nanocompósito foi exposto à radiação X em um equipamento de radiologia convencional utilizando fatores de exposição variáveis de tensão e a atenuação do feixe foi medida com o auxílio de um detector de radiação para diferentes fatores elétricos selecionados no painel de comando do equipamento radiográfico. Os valores de tensão foram elevados em constantes de 10 enquanto que os valores de corrente elétrica (mA) e do produto da corrente pelo tempo de exposição (mAs), foram mantidos fixos. Os resultados obtidos mostraram que os valores da camada semi redutora diminuem com a utilização de nanocompósitos para baixas energias e permanecem sem alterações significativas quando energias mais altas são selecionadas no painel de controle. A redução observada para a camada semi redutora é extremamente relevante pois isso significa que houve um aumento da atenuação do feixe de radiação. Além disso, a partir das imagens geradas e, posteriormente, analisadas através de um software de visualização de imagens digitais, foi possível observar que a adição de nanocompósitos ao filtro de alumínio reduziu o ruído nas imagens sem alterar sua qualidade quando utilizamos baixas energias . O valor do ruído encontrado quando utilizamos os nanocompósitos diminuiu de 15 a 20% em relação ao valor do ruído encontrado na imagem sem a filtração adicional. Além disso, observamos um aumento da razão sinal ruído, o que significa uma melhoria da qualidade da imagem. Esses achados sugerem que esses nanocompósitos podem ser utilizados em testes de controle de qualidade do feixe de radiação e com possibilidade de aplicação na área radiológica.Submitted by Clarice Rosa Machado (clarice.machado@ufn.edu.br) on 2023-12-19T19:50:18Z No. of bitstreams: 2 Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf: 8921877 bytes, checksum: b89baf40a81cea5080a6c669ba847ba5 (MD5) Dissertacao_JulianoIbaldo_TEDE.pdf: 2263381 bytes, checksum: 3ce30b401df70a150b4a7fe4b5b1fe9b (MD5)Made available in DSpace on 2023-12-19T19:50:18Z (GMT). No. of bitstreams: 2 Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf: 8921877 bytes, checksum: b89baf40a81cea5080a6c669ba847ba5 (MD5) Dissertacao_JulianoIbaldo_TEDE.pdf: 2263381 bytes, checksum: 3ce30b401df70a150b4a7fe4b5b1fe9b (MD5) Previous issue date: 2023-05-31application/pdfhttp://www.tede.universidadefranciscana.edu.br:8080/retrieve/11086/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.jpghttp://www.tede.universidadefranciscana.edu.br:8080/retrieve/11088/Dissertacao_JulianoIbaldo_TEDE.pdf.jpgporUniversidade FranciscanaPrograma de Pós-Graduação em NanociênciasUFNBrasilBiociências e Nanomateriaishttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/embargoedAccessfiltros de raios-x, física médica, nanociência, nanocompósitos.x-ray filters, medical physics, nanoscience, nanocomposite.InterdisciplinarUM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIALinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisreponame:Repositório Institucional Universidade Franciscanainstname:Universidade Franciscana (UFN)instacron:UFNTHUMBNAILDissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.jpgDissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.jpgimage/jpeg3813http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/4/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.jpgb89205a56ae5b465f15035d3f62b435aMD54Dissertacao_JulianoIbaldo_TEDE.pdf.jpgDissertacao_JulianoIbaldo_TEDE.pdf.jpgimage/jpeg3813http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/6/Dissertacao_JulianoIbaldo_TEDE.pdf.jpgb89205a56ae5b465f15035d3f62b435aMD56TEXTDissertacao_JulianoIbaldo_TEDE.pdf.txtDissertacao_JulianoIbaldo_TEDE.pdf.txttext/plain66241http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/5/Dissertacao_JulianoIbaldo_TEDE.pdf.txt003033e21f345afbddc16d455ce61deaMD55Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.txtDissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.txttext/plain83534http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/7/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.txt8a375e8fc71426fccb5b86f6cb0af21dMD57ORIGINALDissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdfDissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdfapplication/pdf8921877http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/2/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdfb89baf40a81cea5080a6c669ba847ba5MD52Dissertacao_JulianoIbaldo_TEDE.pdfDissertacao_JulianoIbaldo_TEDE.pdfapplication/pdf2263381http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/3/Dissertacao_JulianoIbaldo_TEDE.pdf3ce30b401df70a150b4a7fe4b5b1fe9bMD53LICENSElicense.txtlicense.txttext/plain; charset=utf-8310http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/1/license.txt7dc66ddb96829ff34b56b1a92c851bcdMD51UFN-BDTD/12172023-12-21 01:00:07.071oai:tede.universidadefranciscana.edu.br:UFN-BDTD/1217RXN0ZSB0cmFiYWxobyBzZXLDoSBsaWNlbmNpYWRvIHNvYiBhIExpY2Vuw6dhIEF0cmlidWnDp8Ojby1Ow6NvQ29tZXJjaWFsLVNlbURlcml2YcOnw7VlcyA0LjAgSW50ZXJuYWNpb25hbCBDcmVhdGl2ZSBDb21tb25zLiBQYXJhIHZpc3VhbGl6YXIgdW1hIGPDs3BpYSBkZXN0YSBsaWNlbsOnYSwgdmlzaXRlIGh0dHA6Ly9jcmVhdGl2ZWNvbW1vbnMub3JnL2xpY2Vuc2VzL2J5LW5jLW5kLzQuMC8gb3UgbWFuZGUgdW1hIGNhcnRhIHBhcmEgQ3JlYXRpdmUgQ29tbW9ucywgUE8gQm94IDE4NjYsIE1vdW50YWluIFZpZXcsIENBIDk0MDQyLCBVU0EuCg==Repositório de Publicaçõeshttp://www.tede.universidadefranciscana.edu.br:8080/http://www.tede.universidadefranciscana.edu.br:8080/oai/requestopendoar:2023-12-21T03:00:07Repositório Institucional Universidade Franciscana - Universidade Franciscana (UFN)false |
dc.title.por.fl_str_mv |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
title |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
spellingShingle |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL Ibaldo, Juliano Martinuzzi filtros de raios-x, física médica, nanociência, nanocompósitos. x-ray filters, medical physics, nanoscience, nanocomposite. Interdisciplinar |
title_short |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
title_full |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
title_fullStr |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
title_full_unstemmed |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
title_sort |
UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL |
author |
Ibaldo, Juliano Martinuzzi |
author_facet |
Ibaldo, Juliano Martinuzzi |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Santos , Claudia Lange dos |
dc.contributor.advisor-co1.fl_str_mv |
Rhoden, Cristiano Rodrigo Bohn |
dc.contributor.referee1.fl_str_mv |
Kunzel , Roseli |
dc.contributor.referee2.fl_str_mv |
Martins, Mirkos Ortiz |
dc.contributor.author.fl_str_mv |
Ibaldo, Juliano Martinuzzi |
contributor_str_mv |
Santos , Claudia Lange dos Rhoden, Cristiano Rodrigo Bohn Kunzel , Roseli Martins, Mirkos Ortiz |
dc.subject.por.fl_str_mv |
filtros de raios-x, física médica, nanociência, nanocompósitos. |
topic |
filtros de raios-x, física médica, nanociência, nanocompósitos. x-ray filters, medical physics, nanoscience, nanocomposite. Interdisciplinar |
dc.subject.eng.fl_str_mv |
x-ray filters, medical physics, nanoscience, nanocomposite. |
dc.subject.cnpq.fl_str_mv |
Interdisciplinar |
description |
Conventional radiological equipment employed in medicine uses radiation beam attenuation filters to eliminate, or at least reduce, low energy photons. The filters used are generally made of aluminum (Al) with different thicknesses, usually from 1 to 3 mm. The aluminum filter is an essential accessory for the quality of the beam used in medical radiology. The low energy photons that are part of the radiation beam emitted by the X ray tube do not contribute to the formation of the radiological image. In fact, they only increase the dose received by the patient since the low energy photons are absorbed by the superficial tissues, and do not reach the image receptor. Current standards require that all equipment used in medical radiology should have minimum filtration that varies according to specific area. In this study, we added an aluminum filter coated with a biopolimer nanocomposite to the x-ray tube on its external part. For this experiment, we used a nanomaterial formed by aluminum nitrate and sodium hydroxide forming an aluminum hydroxide solution that was structured with chitosan. The nanocomposites were characterized through scanning electron microscopy and X-ray Energy Dispersive Spectroscopy. The aluminum filter coated with the nanocomposite was exposed to x-radiation in conventional radiology equipment using variable voltage exposure factors and the beam attenuation was measured using a radiation detector for different electrical factors selected on the control panel of radiographic equipment. The voltage values were increased in constants of 10 , while the values of electric current by the exposure time (milliamperage per second - mAs) remained fixed. The obtained results showed that the values of the semi reducing layer reduced when we used low energies and remained unchanged when high energies were selected on the control panel. The reduction observed for the semi reducing layer is extremely relevant since it implies an increase in the attenuation of the radiation bean. In addition, from the X-ray images which were analyzed using a digital image visualization software, it was possible to observe that the addition of nanocomposites to the aluminum filter reduces the noise in the images without changing their quality. The noise value found when using the nanocomposites decreased from 15 to 20% in relation to the noise value found in the image without additional filtration. Moreover, we observed an increase in the signal-to-noise ratio, which means an improvement in image quality when we used low energies. These findings suggest that these nanocomposites can be used in radiation beam quality control tests and with the possibility of application in the radiological area. |
publishDate |
2023 |
dc.date.accessioned.fl_str_mv |
2023-12-19T19:50:18Z |
dc.date.issued.fl_str_mv |
2023-05-31 |
dc.date.available.fl_str_mv |
2024-08-10 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
Ibaldo, Juliano Martinuzzi. UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL. 2023. 57f. Dissertação( Programa de Pós-Graduação em Nanociências) - Universidade Franciscana, Santa Maria - RS. |
dc.identifier.uri.fl_str_mv |
http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/1217 |
identifier_str_mv |
Ibaldo, Juliano Martinuzzi. UM ESTUDO EXPERIMENTAL SOBRE A FILTRAÇÃO ADICIONAL DO FEIXE DE RAIOS X COM NANOMATERIAL. 2023. 57f. Dissertação( Programa de Pós-Graduação em Nanociências) - Universidade Franciscana, Santa Maria - RS. |
url |
http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/1217 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/embargoedAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Franciscana |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Nanociências |
dc.publisher.initials.fl_str_mv |
UFN |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Biociências e Nanomateriais |
publisher.none.fl_str_mv |
Universidade Franciscana |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional Universidade Franciscana instname:Universidade Franciscana (UFN) instacron:UFN |
instname_str |
Universidade Franciscana (UFN) |
instacron_str |
UFN |
institution |
UFN |
reponame_str |
Repositório Institucional Universidade Franciscana |
collection |
Repositório Institucional Universidade Franciscana |
bitstream.url.fl_str_mv |
http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/4/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.jpg http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/6/Dissertacao_JulianoIbaldo_TEDE.pdf.jpg http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/5/Dissertacao_JulianoIbaldo_TEDE.pdf.txt http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/7/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf.txt http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/2/Dissertacao_JulianoMartinuzziIbaldo_SemAssinaturas.pdf http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/3/Dissertacao_JulianoIbaldo_TEDE.pdf http://tede.universidadefranciscana.edu.br:8080/bitstream/UFN-BDTD/1217/1/license.txt |
bitstream.checksum.fl_str_mv |
b89205a56ae5b465f15035d3f62b435a b89205a56ae5b465f15035d3f62b435a 003033e21f345afbddc16d455ce61dea 8a375e8fc71426fccb5b86f6cb0af21d b89baf40a81cea5080a6c669ba847ba5 3ce30b401df70a150b4a7fe4b5b1fe9b 7dc66ddb96829ff34b56b1a92c851bcd |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional Universidade Franciscana - Universidade Franciscana (UFN) |
repository.mail.fl_str_mv |
|
_version_ |
1797147551389974528 |