Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams

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 c...

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Autores: Freire, Marta, González Montoro, Andrea, Sánchez, Filomeno, Benlloch Baviera, José María, González Martínez, Antonio Javier
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/420044
Acceso en línea:http://hdl.handle.net/10261/420044
https://api.elsevier.com/content/abstract/scopus_id/85085993104
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 DiagramsFreire, MartaGonzález Montoro, AndreaSánchez, FilomenoBenlloch Baviera, José MaríaGonzález Martínez, Antonio JavierCalibration processesGamma ray detectorsMonolithic crystalsPositron emission tomography (PET)SiPMVoronoi diagramsMolecular 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 × 50 × 15 mm3 LYSO blocks coupled to a 12 × 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 Economía, Industria y Competitividad under Grant TEC2016-79884-C2-1-R.Peer reviewedInstitute of Electrical and Electronics EngineersEuropean CommissionMinisterio de Economía, Industria y Competitividad (España)Freire, Marta [0000-0002-1150-383X]González Montoro, Andrea [0000-0002-7319-4278]Sánchez, Filomeno [0000-0003-0831-4744]Benlloch Baviera, José María [0000-0001-6073-1436]González Martínez, Antonio Javier [0000-0001-6742-5626]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/420044https://api.elsevier.com/content/abstract/scopus_id/85085993104reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/695536info:eu-repo/grantAgreement/MINECO//TEC2016-79884-C2-1-RThe underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1109/TRPMS.2019.2947716https://doi.org/10.1109/TRPMS.2019.2947716Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4200442026-05-22T06:33:51Z
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
Freire, Marta
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 Freire, Marta
González Montoro, Andrea
Sánchez, Filomeno
Benlloch Baviera, José María
González Martínez, Antonio Javier
author Freire, Marta
author_facet Freire, Marta
González Montoro, Andrea
Sánchez, Filomeno
Benlloch Baviera, José María
González Martínez, Antonio Javier
author_role author
author2 González Montoro, Andrea
Sánchez, Filomeno
Benlloch Baviera, José María
González Martínez, Antonio Javier
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía, Industria y Competitividad (España)
Freire, Marta [0000-0002-1150-383X]
González Montoro, Andrea [0000-0002-7319-4278]
Sánchez, Filomeno [0000-0003-0831-4744]
Benlloch Baviera, José María [0000-0001-6073-1436]
González Martínez, Antonio Javier [0000-0001-6742-5626]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
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 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 × 50 × 15 mm3 LYSO blocks coupled to a 12 × 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
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/420044
https://api.elsevier.com/content/abstract/scopus_id/85085993104
url http://hdl.handle.net/10261/420044
https://api.elsevier.com/content/abstract/scopus_id/85085993104
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/695536
info:eu-repo/grantAgreement/MINECO//TEC2016-79884-C2-1-R
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1109/TRPMS.2019.2947716
https://doi.org/10.1109/TRPMS.2019.2947716
Sí
dc.rights.none.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 Institute of Electrical and Electronics Engineers
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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