Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams
[EN] Molecular imaging systems, such as positron emission tomography (PET), use detectors providing energy and a 3-D interaction position of a gamma ray within a scintillation block. Monolithic crystals are becoming an alternative to crystal arrays in PET. However, calibration processes are required...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/168935 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/168935 |
| Access Level: | acceso abierto |
| Palabra clave: | Calibration processes Gamma ray detectors Monolithic crystals Positron emission tomography (PET) SiPM Voronoi diagrams |
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Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi DiagramsGonzález Martínez, Antonio JavierFreire-López-Fando, MartaF SánchezBenlloch Baviera, Jose María|||0000-0001-6073-1436Gonzalez-Montoro, AndreaCalibration processesGamma ray detectorsMonolithic crystalsPositron emission tomography (PET)SiPMVoronoi diagrams[EN] Molecular imaging systems, such as positron emission tomography (PET), use detectors providing energy and a 3-D interaction position of a gamma ray within a scintillation block. Monolithic crystals are becoming an alternative to crystal arrays in PET. However, calibration processes are required to correct for nonuniformities, mainly produced by the truncation of the scintillation light distribution at the edges. We propose a calibration method based on the Voronoi diagrams. We have used $50 \times 50 \times 15$ mm(3) LYSO blocks coupled to a $12\times 12$ SiPMs array. We have first studied two different interpolation algorithms: 1) weighted average method (WAM) and 2) natural neighbor (NN). We have compared them with an existing calibration based on 1-D monomials. Here, the crystal was laterally black painted and a retroreflector (RR) layer added to the entrance face. The NN exhibited the best results in terms of XY impact position, depth of Interaction, and energy, allowing us to calibrate the whole scintillation volume. Later, the NN interpolation has been tested against different crystal surface treatments, allowing always to correct edge effects. Best energy resolutions were observed when using the reflective layers (12%-14%). However, better linearity was observed with the treatments using black paint. In particular, we obtained the best overall performance when lateral black paint is combined with the RR.This work was supported in part by the European Research Council through the European Union's Horizon 2020 Research and Innovation Program under Grant 695536, and in part by the Spanish Ministerio de Economia, Industria y Competitividad under Grant TEC2016-79884-C2-1-R.Institute of Electrical and Electronics EngineersInstituto de Instrumentación para Imagen MolecularEuropean CommissionMinisterio de Economía y CompetitividadRepositorio Institucional de la Universitat Politècnica de València Riunet20202020-05-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/168935reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengEuropean Commission https://doi.org/10.13039/501100000780 H2020 695536 Innovative PET scanner for dynamic imagingMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Programa Estatal de I+D+i Orientado a los Retos de la Sociedad TEC2016-79884-C2-1-Ropen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento (by)http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1689352026-06-13T07:49:27Z |
| dc.title.none.fl_str_mv |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| title |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| spellingShingle |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams González Martínez, Antonio Javier Calibration processes Gamma ray detectors Monolithic crystals Positron emission tomography (PET) SiPM Voronoi diagrams |
| title_short |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| title_full |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| title_fullStr |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| title_full_unstemmed |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| title_sort |
Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams |
| dc.creator.none.fl_str_mv |
González Martínez, Antonio Javier Freire-López-Fando, Marta F Sánchez Benlloch Baviera, Jose María|||0000-0001-6073-1436 Gonzalez-Montoro, Andrea |
| author |
González Martínez, Antonio Javier |
| author_facet |
González Martínez, Antonio Javier Freire-López-Fando, Marta F Sánchez Benlloch Baviera, Jose María|||0000-0001-6073-1436 Gonzalez-Montoro, Andrea |
| author_role |
author |
| author2 |
Freire-López-Fando, Marta F Sánchez Benlloch Baviera, Jose María|||0000-0001-6073-1436 Gonzalez-Montoro, Andrea |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Instituto de Instrumentación para Imagen Molecular European Commission Ministerio de Economía y Competitividad Repositorio Institucional de la Universitat Politècnica de València Riunet |
| dc.subject.none.fl_str_mv |
Calibration processes Gamma ray detectors Monolithic crystals Positron emission tomography (PET) SiPM Voronoi diagrams |
| topic |
Calibration processes Gamma ray detectors Monolithic crystals Positron emission tomography (PET) SiPM Voronoi diagrams |
| description |
[EN] Molecular imaging systems, such as positron emission tomography (PET), use detectors providing energy and a 3-D interaction position of a gamma ray within a scintillation block. Monolithic crystals are becoming an alternative to crystal arrays in PET. However, calibration processes are required to correct for nonuniformities, mainly produced by the truncation of the scintillation light distribution at the edges. We propose a calibration method based on the Voronoi diagrams. We have used $50 \times 50 \times 15$ mm(3) LYSO blocks coupled to a $12\times 12$ SiPMs array. We have first studied two different interpolation algorithms: 1) weighted average method (WAM) and 2) natural neighbor (NN). We have compared them with an existing calibration based on 1-D monomials. Here, the crystal was laterally black painted and a retroreflector (RR) layer added to the entrance face. The NN exhibited the best results in terms of XY impact position, depth of Interaction, and energy, allowing us to calibrate the whole scintillation volume. Later, the NN interpolation has been tested against different crystal surface treatments, allowing always to correct edge effects. Best energy resolutions were observed when using the reflective layers (12%-14%). However, better linearity was observed with the treatments using black paint. In particular, we obtained the best overall performance when lateral black paint is combined with the RR. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2020-05-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://riunet.upv.es/handle/10251/168935 |
| url |
https://riunet.upv.es/handle/10251/168935 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
European Commission https://doi.org/10.13039/501100000780 H2020 695536 Innovative PET scanner for dynamic imaging Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Programa Estatal de I+D+i Orientado a los Retos de la Sociedad TEC2016-79884-C2-1-R |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Reconocimiento (by) http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Reconocimiento (by) http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Institute of Electrical and Electronics Engineers |
| publisher.none.fl_str_mv |
Institute of Electrical and Electronics Engineers |
| dc.source.none.fl_str_mv |
reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname:Universitat Politècnica de València (UPV) |
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Universitat Politècnica de València (UPV) |
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
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