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

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

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dc.contributor.author Freire, Marta es_ES
dc.contributor.author Gonzalez-Montoro, Andrea es_ES
dc.contributor.author Sánchez Martínez, Filomeno es_ES
dc.contributor.author Benlloch Baviera, Jose María es_ES
dc.contributor.author González Martínez, Antonio Javier es_ES
dc.date.accessioned 2021-07-08T03:31:09Z
dc.date.available 2021-07-08T03:31:09Z
dc.date.issued 2020-05 es_ES
dc.identifier.issn 2469-7311 es_ES
dc.identifier.uri http://hdl.handle.net/10251/168935
dc.description.abstract [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. es_ES
dc.description.sponsorship 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. es_ES
dc.language Inglés es_ES
dc.publisher Institute of Electrical and Electronics Engineers es_ES
dc.relation.ispartof IEEE Transactions on Radiation and Plasma Medical Sciences es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Calibration processes es_ES
dc.subject Gamma ray detectors es_ES
dc.subject Monolithic crystals es_ES
dc.subject Positron emission tomography (PET) es_ES
dc.subject SiPM es_ES
dc.subject Voronoi diagrams es_ES
dc.title Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1109/TRPMS.2019.2947716 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/695536/EU/Innovative PET scanner for dynamic imaging/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//TEC2016-79884-C2-1-R/ES/DESARROLLO DEL HARDWARE PARA SISTEMA DE DIAGNOSTICO POR IMAGEN MOLECULAR PARA CORAZON EN CONDICIONES DE ESTRES/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular es_ES
dc.description.bibliographicCitation Freire, M.; Gonzalez-Montoro, A.; Sánchez Martínez, F.; Benlloch Baviera, JM.; González Martínez, AJ. (2020). Calibration of Gamma Ray Impacts in Monolithic-Based Detectors Using Voronoi Diagrams. IEEE Transactions on Radiation and Plasma Medical Sciences. 4(3):350-360. https://doi.org/10.1109/TRPMS.2019.2947716 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1109/TRPMS.2019.2947716 es_ES
dc.description.upvformatpinicio 350 es_ES
dc.description.upvformatpfin 360 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 4 es_ES
dc.description.issue 3 es_ES
dc.relation.pasarela S\432478 es_ES
dc.contributor.funder European Commission es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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