Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0103-97332005000500018 http://hdl.handle.net/11449/29746 |
Resumo: | Computed Tomography (CT) has made possible visualization of physical structures in the interior of an object in their real relative spatial position and orientation. Another important contribution of CT is to greatly improve abilities to distinguish regions with different gamma ray transmittance and to separate over-lying structures. The mathematical problem of CT imaging is that of estimating an image from its projections. In this work, the experimental setup was performed using the Mini Computerized Tomograph of Uniso (MTCU). This tomograph system operates with a gamma ray source of 241Am (photons of 60 KeV and 100 mCi of intensity) and a NaI(Tl) solid state detector. The system features translation and rotation scanning modes, a 100 mm effective field of view, 1 mm of spatial resolution and 5 % to 10 % of density resolution. The image reconstruction problem can be solved using two different algorithms: Algebraic Reconstruction Techniques (ART) or Discrete Filtered Backprojection (FBP). The three-dimensional image reconstruction method discussed in this work, involves obtaining two-dimensional (2D) gamma ray tomography images and then combining these images into a three-dimensional (3D) volume data. An opacity, shading and color is attributed to each volume element (voxel) and the resulting scene is projected in a picture plane to be display in a monitor. Our implementation was developed to be used with MTCU data and was based in the Ray casting volume rendering technique. The use of such technique for nondestructive evaluation is a powerful tool to enable a visual trip inside an object without physically opening or cutting it. Experimental and theoretical methods used are discussed and results of experiments using the 3D reconstruction techniques are presented. A particular use of this technique to study concrete properties, such as stones distributions, visualization of structural occurrences inside concrete samples is discussed. |
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Repositório Institucional da UNESP |
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Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniquesComputed Tomography (CT) has made possible visualization of physical structures in the interior of an object in their real relative spatial position and orientation. Another important contribution of CT is to greatly improve abilities to distinguish regions with different gamma ray transmittance and to separate over-lying structures. The mathematical problem of CT imaging is that of estimating an image from its projections. In this work, the experimental setup was performed using the Mini Computerized Tomograph of Uniso (MTCU). This tomograph system operates with a gamma ray source of 241Am (photons of 60 KeV and 100 mCi of intensity) and a NaI(Tl) solid state detector. The system features translation and rotation scanning modes, a 100 mm effective field of view, 1 mm of spatial resolution and 5 % to 10 % of density resolution. The image reconstruction problem can be solved using two different algorithms: Algebraic Reconstruction Techniques (ART) or Discrete Filtered Backprojection (FBP). The three-dimensional image reconstruction method discussed in this work, involves obtaining two-dimensional (2D) gamma ray tomography images and then combining these images into a three-dimensional (3D) volume data. An opacity, shading and color is attributed to each volume element (voxel) and the resulting scene is projected in a picture plane to be display in a monitor. Our implementation was developed to be used with MTCU data and was based in the Ray casting volume rendering technique. The use of such technique for nondestructive evaluation is a powerful tool to enable a visual trip inside an object without physically opening or cutting it. Experimental and theoretical methods used are discussed and results of experiments using the 3D reconstruction techniques are presented. A particular use of this technique to study concrete properties, such as stones distributions, visualization of structural occurrences inside concrete samples is discussed.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade de SorocabaFaculdade de Engenharia de SorocabaUniversidade Estadual Paulista Julio de Mesquita FilhoUniversidade Estadual Paulista Julio de Mesquita FilhoSociedade Brasileira de FísicaUniversidade de SorocabaFaculdade de Engenharia de SorocabaUniversidade Estadual Paulista (Unesp)Oliveira Jr., J. M. deLima, F. Z. C. deMilito, J. A. deMartins, A. C. G. [UNESP]2014-05-20T15:15:43Z2014-05-20T15:15:43Z2005-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article789-792application/pdfhttp://dx.doi.org/10.1590/S0103-97332005000500018Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 35, n. 3b, p. 789-792, 2005.0103-9733http://hdl.handle.net/11449/2974610.1590/S0103-97332005000500018S0103-97332005000500018S0103-97332005000500018.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Physics1.0820,276info:eu-repo/semantics/openAccess2024-01-25T06:33:08Zoai:repositorio.unesp.br:11449/29746Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:57:45.192004Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
title |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
spellingShingle |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques Oliveira Jr., J. M. de |
title_short |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
title_full |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
title_fullStr |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
title_full_unstemmed |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
title_sort |
Development and applications of three-dimensional gamma ray tomography system using ray casting volume rendering techniques |
author |
Oliveira Jr., J. M. de |
author_facet |
Oliveira Jr., J. M. de Lima, F. Z. C. de Milito, J. A. de Martins, A. C. G. [UNESP] |
author_role |
author |
author2 |
Lima, F. Z. C. de Milito, J. A. de Martins, A. C. G. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade de Sorocaba Faculdade de Engenharia de Sorocaba Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Oliveira Jr., J. M. de Lima, F. Z. C. de Milito, J. A. de Martins, A. C. G. [UNESP] |
description |
Computed Tomography (CT) has made possible visualization of physical structures in the interior of an object in their real relative spatial position and orientation. Another important contribution of CT is to greatly improve abilities to distinguish regions with different gamma ray transmittance and to separate over-lying structures. The mathematical problem of CT imaging is that of estimating an image from its projections. In this work, the experimental setup was performed using the Mini Computerized Tomograph of Uniso (MTCU). This tomograph system operates with a gamma ray source of 241Am (photons of 60 KeV and 100 mCi of intensity) and a NaI(Tl) solid state detector. The system features translation and rotation scanning modes, a 100 mm effective field of view, 1 mm of spatial resolution and 5 % to 10 % of density resolution. The image reconstruction problem can be solved using two different algorithms: Algebraic Reconstruction Techniques (ART) or Discrete Filtered Backprojection (FBP). The three-dimensional image reconstruction method discussed in this work, involves obtaining two-dimensional (2D) gamma ray tomography images and then combining these images into a three-dimensional (3D) volume data. An opacity, shading and color is attributed to each volume element (voxel) and the resulting scene is projected in a picture plane to be display in a monitor. Our implementation was developed to be used with MTCU data and was based in the Ray casting volume rendering technique. The use of such technique for nondestructive evaluation is a powerful tool to enable a visual trip inside an object without physically opening or cutting it. Experimental and theoretical methods used are discussed and results of experiments using the 3D reconstruction techniques are presented. A particular use of this technique to study concrete properties, such as stones distributions, visualization of structural occurrences inside concrete samples is discussed. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-09-01 2014-05-20T15:15:43Z 2014-05-20T15:15:43Z |
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://dx.doi.org/10.1590/S0103-97332005000500018 Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 35, n. 3b, p. 789-792, 2005. 0103-9733 http://hdl.handle.net/11449/29746 10.1590/S0103-97332005000500018 S0103-97332005000500018 S0103-97332005000500018.pdf |
url |
http://dx.doi.org/10.1590/S0103-97332005000500018 http://hdl.handle.net/11449/29746 |
identifier_str_mv |
Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 35, n. 3b, p. 789-792, 2005. 0103-9733 10.1590/S0103-97332005000500018 S0103-97332005000500018 S0103-97332005000500018.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Physics 1.082 0,276 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
789-792 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129566708858880 |