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dc.contributor.author | González, A. | es_ES |
dc.contributor.author | Sanchez, Filomeno | es_ES |
dc.contributor.author | Bruyndonckx, Peter | es_ES |
dc.contributor.author | Cañizares-Ledo, Gabriel | es_ES |
dc.contributor.author | Benlloch Baviera, Jose María | es_ES |
dc.contributor.author | González Martínez, Antonio Javier | es_ES |
dc.date.accessioned | 2020-04-17T12:48:27Z | |
dc.date.available | 2020-04-17T12:48:27Z | |
dc.date.issued | 2019-03-11 | es_ES |
dc.identifier.issn | 0168-9002 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/140848 | |
dc.description.abstract | [EN] The main aim of this work is to provide a method to retrieve the intrinsic spatial resolution of a gamma-ray detector block based on monolithic crystals within an assembled scanner. This method consists on a discrimination of the data using a software collimation process. The results are compared with an alternative method of separating two detector blocks far enough to produce a "virtual" source collimation due to the geometric constraints on the allowed coincidence event angles. A theoretical model has been deduced to fit the measured light distribution profiles, allowing estimating the detector intrinsic spatial resolution. The detector intrinsic spatial resolution is expected to follow a Gaussian distribution and the positron-emitter source shape, given the small size of a Na-22 source with 0.25 mm in diameter, can be assumed to follow a Lorentzian profile. However, the collimation of the data modifies the source shape that is no longer a pure Lorentzian distribution. Therefore, the model is based on the convolution of a Gaussian shaped distribution (contribution of the detector) and a modified Lorentzian distribution (contribution of the collimated source profile) that takes into account the collimation effect. Three LYSO crystals geometries have been studied in the present work, namely a 10 mm thick trapezoidal monolithic block, and two rectangular monolithic blocks with thicknesses of 15 mm and 20 mm, respectively. All the blocks have size dimensions of 50 mm x 50 mm. The experimental results yielded an intrinsic detector spatial resolution of 0.64 +/- 0.02 mm, 0.82 +/- 0.02 and 1.07 +/- 0.03 mm, for the 10 mm, 15 mm and 20 mm thick blocks, respectively, when the source was placed at the center of the detector. The detector intrinsic spatial resolution was moreover evaluated across one of the axis of each crystal. These values worsen to an average value of 0.68 +/- 0.04 mm, 0.90 +/- 0.14 and 1.29 +/- 0.19 mm, respectively, when the whole crystal size is considered, as expected. These tests show an accurate method to determine the intrinsic spatial resolution of monolithic-based detector blocks, once assembled in the PET system. | es_ES |
dc.description.sponsorship | This project has received funding from the European Research Council, Spain (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No 695536). It has also been supported by the EU, Spain Grant 603002 under the FP7 program, and by the Spanish Ministerio de Economia, Industria y Competitividad under Grant TEC2016-79884-C2-1-R and through PROSPET (DTS15/00152) funded by the Ministerio de Economia y Competitividad, Spain. | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject | Gamma ray detectors | es_ES |
dc.subject | Positron Emission Tomography | es_ES |
dc.subject | Intrinsic spatial resolution | es_ES |
dc.subject | SiPM array | es_ES |
dc.subject | Monolithic blocks | es_ES |
dc.title | Novel method to measure the intrinsic spatial resolution in PET detectors based on monolithic crystals | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1016/j.nima.2018.12.056 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//DTS15%2F00152/ES/Desarrollo de un detector PET para guiar la biopsia, el tratamiento y el seguimiento del cáncer de próstata (PROSPECT)/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/603002/EU/Multimodal Imaging of Neurological Disorders/ | 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.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/695536/EU/Innovative PET scanner for dynamic imaging/ | |
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.contributor.affiliation | Universitat Politècnica de València. Instituto Universitario Mixto de Biología Molecular y Celular de Plantas - Institut Universitari Mixt de Biologia Molecular i Cel·lular de Plantes | es_ES |
dc.description.bibliographicCitation | González, A.; Sanchez, F.; Bruyndonckx, P.; Cañizares-Ledo, G.; Benlloch Baviera, JM.; González Martínez, AJ. (2019). Novel method to measure the intrinsic spatial resolution in PET detectors based on monolithic crystals. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 920:58-67. https://doi.org/10.1016/j.nima.2018.12.056 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.nima.2018.12.056 | es_ES |
dc.description.upvformatpinicio | 58 | es_ES |
dc.description.upvformatpfin | 67 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 920 | es_ES |
dc.relation.pasarela | S\406016 | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.contributor.funder | Ministerio de Economía y Competitividad |