{ "@graph" : [ { "@id" : "http://semantics.gr/authorities/EKT-voc-classifier/1573636727", "@type" : "skos:Concept", "broader" : "http://semantics.gr/authorities/EKT-voc-classifier/1776219804", "closeMatch" : [ "http://id.loc.gov/authorities/subjects/sh85093024", "http://semantics.gr/authorities/ekt-unesco/198681461", "http://id.loc.gov/authorities/subjects/sh2015003070", "http://vocabularies.unesco.org/thesaurus/concept128", "http://vocabularies.unesco.org/thesaurus/concept9717" ], "exactMatch" : "http://semantics.gr/authorities/EKT-voc/1573636727", "note" : { "@language" : "en", "@value" : "isi - Physics, Nuclear includes resources on the study of nuclear structure, decay, radioactivity, reactions, and scattering. Resources in this category focus on low-energy physics. High-energy physics is covered in the PHYSICS, PARTICLES & FIELDS category." }, "prefLabel" : [ { "@language" : "el", "@value" : "Πυρηνική φυσική" }, { "@language" : "en", "@value" : "Nuclear Physics" } ], "relatedMatch" : [ "http://id.loc.gov/authorities/subjects/sh85098374", "http://id.loc.gov/authorities/subjects/sh85056400", "http://vocabularies.unesco.org/thesaurus/concept1237", "http://id.loc.gov/authorities/subjects/sh85110340", "http://id.loc.gov/authorities/subjects/sh85027256", "http://id.loc.gov/authorities/subjects/sh85028443" ] }, { "@id" : "http://semantics.gr/authorities/openarchives-item-types/Conference-article", "@type" : "skos:Concept", "broader" : "http://semantics.gr/authorities/openarchives-item-types/Conference-item", "prefLabel" : [ { "@language" : "en", "@value" : "Conference article" }, { "@language" : "el", "@value" : "Άρθρο συνεδρίου" } ] }, { "@id" : "http://semantics.gr/authorities/openarchives-item-types/Scientific-article", "@type" : "skos:Concept", "broader" : "http://semantics.gr/authorities/openarchives-item-types/arthro", "prefLabel" : [ { "@language" : "en", "@value" : "Scientific article" }, { "@language" : "el", "@value" : "Επιστημονικό άρθρο" } ] }, { "@id" : "https://www.openarchives.gr/aggregator-openarchives/edm/aggregation/provider/000118-2516%231", "@type" : "ore:Aggregation", "aggregatedCHO" : "https://www.openarchives.gr/aggregator-openarchives/edm/hnps/000118-2516", "dataProvider" : "Hellenic Nuclear Physics Society", "isShownAt" : "https://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/2516", "provider" : "Greek Aggregator OpenArchives.gr | National Documentation Centre (EKT)", "edm:rights" : "other" }, { "@id" : "https://www.openarchives.gr/aggregator-openarchives/edm/hnps/000118-2516", "@type" : "edm:ProvidedCHO", "creator" : [ "Zioga, M.", "Mikeli, M.", "Stiliaris, E.", "Rapsomanikis, A.-N.", "Thanassas, D." ], "description" : { "@language" : "en", "@value" : "The sensitivity and the spatial resolution of a small-field γ-Camera system based on a Position Sensitive Photomultiplier Tube (PSPMT) on a tomographic level are examined in this study. A cylindrical Gel-Phantom (d = 40 mm, h = 50 mm) with cylindro-conoidal tubes and capillaries (from 64 to 640 mm3 in volume) containing water solution of 99mTc is used as a test phantom in the present work. A total of 24 projections covering the full angle region (0°-360°) are obtained with the γ-Camera system under examination. The planar information is further analyzed to reconstruct the tomographic images taking into account all off-line corrections needed to remove barreloid deformations appearing at the edges of the Field-of- View. The reconstruction procedure is performed with iterative algorithms and for comparison reasons two different techniques (MLEM and accelerated ART) are used. The variety of the 99mTc-volumes in the phantom with the given specific radioactivity and the phantom axial asymmetry, due to the diÆerent radial distances of the tubes in the gel environment, allow a realistic characterization of the system’s performance on a tomographic level. Obtained experimental results for the system sensitivity and spatial resolution are presented and discussed in this work." }, "format" : "application/pdf", "identifier" : [ "10.12681/hnps.2516", "https://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/2516" ], "language" : "eng", "publisher" : { "@language" : "en", "@value" : "Hellenic Nuclear Physics Society (HNPS)" }, "relation" : "https://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/2516/2392", "rights" : { "@language" : "el", "@value" : "Πνευματική ιδιοκτησία (c) 2019 A.-N. Rapsomanikis, M. Zioga, M. Mikeli, D. Thanassas, E. Stiliaris" }, "source" : [ "2654-0088", { "@language" : "en", "@value" : "HNPS Advances in Nuclear Physics; Vol. 19 (2011): HNPS2011; 55-59" }, "2654-007X", "Annual Symposium of the Hellenic Nuclear Physics Society", { "@language" : "el", "@value" : "Annual Symposium of the Hellenic Nuclear Physics Society; Τόμ. 19 (2011): HNPS2011; 55-59" } ], "subject" : [ { "@language" : "en", "@value" : "Tomographic Image Reconstruction" }, { "@language" : "en", "@value" : "SPECT" }, { "@language" : "en", "@value" : "γ-Camera" }, { "@language" : "en", "@value" : "MLEM" }, { "@language" : "en", "@value" : "ART" }, { "@id" : "http://semantics.gr/authorities/EKT-voc-classifier/1573636727" } ], "title" : { "@language" : "en", "@value" : "Sensitivity and Resolution Study of a Small-Field γ-Camera System on a Tomographic Level" }, "type" : [ "http://semantics.gr/authorities/openarchives-item-types/Conference-article", "http://semantics.gr/authorities/openarchives-item-types/Scientific-article" ], "dc:type" : [ "info:eu-repo/semantics/publishedVersion", "info:eu-repo/semantics/article" ], "created" : "2020-01-01" } ], "@context" : { "source" : { "@id" : "http://purl.org/dc/elements/1.1/source" }, "creator" : { "@id" : "http://purl.org/dc/elements/1.1/creator" }, "title" : { "@id" : "http://purl.org/dc/elements/1.1/title" }, "subject" : { "@id" : "http://purl.org/dc/elements/1.1/subject" }, "type" : { "@id" : "http://purl.org/dc/elements/1.1/type", "@type" : "@id" }, "description" : { "@id" : "http://purl.org/dc/elements/1.1/description" }, "format" : { "@id" : "http://purl.org/dc/elements/1.1/format" }, "created" : { "@id" : "http://purl.org/dc/terms/created" }, "publisher" : { "@id" : "http://purl.org/dc/elements/1.1/publisher" }, "identifier" : { "@id" : "http://purl.org/dc/elements/1.1/identifier" }, "rights" : { "@id" : "http://purl.org/dc/elements/1.1/rights" }, "language" : { "@id" : "http://purl.org/dc/elements/1.1/language" }, "relation" : { "@id" : "http://purl.org/dc/elements/1.1/relation", "@type" : "@id" }, "provider" : { "@id" : "http://www.europeana.eu/schemas/edm/provider" }, "isShownAt" : { "@id" : "http://www.europeana.eu/schemas/edm/isShownAt", "@type" : "@id" }, "dataProvider" : { "@id" : "http://www.europeana.eu/schemas/edm/dataProvider" }, "aggregatedCHO" : { "@id" : "http://www.europeana.eu/schemas/edm/aggregatedCHO", "@type" : "@id" }, "broader" : { "@id" : "http://www.w3.org/2004/02/skos/core#broader", "@type" : "@id" }, "prefLabel" : { "@id" : "http://www.w3.org/2004/02/skos/core#prefLabel" }, "closeMatch" : { "@id" : "http://www.w3.org/2004/02/skos/core#closeMatch", "@type" : "@id" }, "exactMatch" : { "@id" : "http://www.w3.org/2004/02/skos/core#exactMatch", "@type" : "@id" }, "relatedMatch" : { "@id" : "http://www.w3.org/2004/02/skos/core#relatedMatch", "@type" : "@id" }, "note" : { "@id" : "http://www.w3.org/2004/02/skos/core#note" }, "ore" : "http://www.openarchives.org/ore/terms/", "owl" : "http://www.w3.org/2002/07/owl#", "svcs" : "http://rdfs.org/sioc/services#", "skos" : "http://www.w3.org/2004/02/skos/core#", "rdfs" : "http://www.w3.org/2000/01/rdf-schema#", "rdaGr2" : "http://rdvocab.info/ElementsGr2/", "edm" : "http://www.europeana.eu/schemas/edm/", "ekt" : "https://www.semantics.gr/authorities/schemanamespaces/ekt#", "doap" : "http://usefulinc.com/ns/doap#", "rdf" : "http://www.w3.org/1999/02/22-rdf-syntax-ns#", "xalan" : "http://xml.apache.org/xalan", "dcterms" : "http://purl.org/dc/terms/", "wgs84_pos" : "http://www.w3.org/2003/01/geo/wgs84_pos#", "foaf" : "http://xmlns.com/foaf/0.1/", "crm" : "http://www.cidoc-crm.org/rdfs/cidoc_crm_v5.0.2_english_label.rdfs#", "dc" : "http://purl.org/dc/elements/1.1/" } }