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...

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Autores: González Martínez, Antonio Javier, Freire-López-Fando, Marta, F Sánchez, Benlloch Baviera, Jose María|||0000-0001-6073-1436, Gonzalez-Montoro, Andrea
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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spelling 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)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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