{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R60VYYNR/508808db-3e04-49ac-aaa0-4ca4cbd6af41/HTML","dcterms:extent":"33 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R60VYYNR/db186fd1-323f-43c7-a9c0-efa0ec1f503c/PDF","dcterms:extent":"233 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R60VYYNR/273d9e32-0931-445b-8c8c-77017e670779/TEXT","dcterms:extent":"22 KB"}],"edm:TimeSpan":{"@rdf:about":"1992-2025","edm:begin":{"@xml:lang":"en","#text":"1992"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-R60VYYNR","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-FNIFVE9S"},{"@xml:lang":"sl","#text":"Radiology and oncology (Ljubljana)"}],"dcterms:issued":"2001","dc:creator":["Fallone, Biagio Gino","Lachaine, Martin"],"dc:format":[{"@xml:lang":"sl","#text":"številka:1"},{"@xml:lang":"sl","#text":"letnik:35"},{"@xml:lang":"sl","#text":"9 strani"},{"@xml:lang":"sl","#text":"str. 63-71"}],"dc:identifier":["COBISSID:12888537","ISSN:1318-2099","URN:URN:NBN:SI:doc-R60VYYNR"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Association of Radiology and Oncology"},"dc:subject":[{"@xml:lang":"en","#text":"diagnostika"},{"@xml:lang":"en","#text":"Equipment design"},{"@xml:lang":"en","#text":"Instrumentation"},{"@xml:lang":"en","#text":"Methods"},{"@xml:lang":"en","#text":"Monte carlo method"},{"@xml:lang":"sl","#text":"radiologija"},{"@xml:lang":"en","#text":"Radiotherapy dosage"}],"dcterms:temporal":{"@rdf:resource":"1992-2025"},"dc:title":{"@xml:lang":"sl","#text":"Design considerations for direct and indirect active matrix flat-panel portal imagers| Premisleki pri načrtovanju neposrednih in posrednih ravnih prikazovalnikov z aktivno matriko za portalno slikanje|"},"dc:description":[{"@xml:lang":"sl","#text":"Background. Recent advances in thin film transistor (TFT) technology have allowed the construction of active matrix flat-panel imagers (AMFPI) for various medical imaging modalities. Since the design of such systems is still in the development stage, it is unclear what detector characteristics are required in order to optimize these detectors for portal imaging. Material andmethods. In this work, we used cascade analysis and Monte Carlo techniques to calculate the DQE for both direct and indirect AMFPIs for portal imaging, and use these calculations to study the optimal detector characteristics. We validate our calculations with existing experimental data. Results. We show that the for ideal flat-panel characteristics the direct and indirect detection methods have the same DQE for a given mass thickness. Conclusions. We generate graphs which may be helpful in the design of future megavoltage AMFPIs"},{"@xml:lang":"sl","#text":"Izhodišča. Napredek v tehnologiji tankih tranzistorskih plasti je omogočil izdelavo ravnih slikovnih prikazovalnikov z aktivno matriko, ki jih uporabljamo na različnih področjih medicinskega slikanja. Ker je načrtovanje teh prikazovalnikov še zmeraj v razvojni fazi, ni jasno, kakšne morajo biti njihove detektorske karakteristike za optimalno uporabo v portalnem slikanju. Material in metode. Za izračun kvantnega izkoristka detektorja za neposredne in posredne prikazovalnike z aktivno matriko smo uporabljali kaskadno analizo in tehnike Monte Carlo. Rezultate izračunov smo uporabili za študij optimalnihkarakteristik detektorja. Svoje izračune smo potrdili z rezultati obstoječih meritev. Rezultati. Pokazali smo, da imajo neposredne in posredne metode detekcije enak kvantni izkoristek za ravni prikazovalnik z idealnim karakteristikami pri dani masni debelini detektorja. Zaključki. Ustvarili smo grafe, koristne pri načrtovanju prihodnjih megavoltnih ravnih prikazovalnikov z aktivno matriko"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-R60VYYNR","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-R60VYYNR"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-R60VYYNR/db186fd1-323f-43c7-a9c0-efa0ec1f503c/PDF"},"edm:rights":{"@rdf:resource":"http://creativecommons.org/licenses/by/4.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Društvo radiologije in onkologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-R60VYYNR/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-R60VYYNR"}}}}