Cascade modeling of pixelated scintillator detectors for x-ray imaging

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dc.contributor.authorKim, Ho Kyungko
dc.contributor.authorYun, Seung Manko
dc.contributor.authorKo, Jong Sooko
dc.contributor.authorCho, Gyuseongko
dc.contributor.authorGraeve, Thorstenko
dc.date.accessioned2013-03-08T09:04:14Z-
dc.date.available2013-03-08T09:04:14Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2008-06-
dc.identifier.citationIEEE TRANSACTIONS ON NUCLEAR SCIENCE, v.55, no.3, pp.1357 - 1366-
dc.identifier.issn0018-9499-
dc.identifier.urihttp://hdl.handle.net/10203/92686-
dc.description.abstractWe have modeled the signal and noise propagation in a pixelated scintillator detector by using the cascaded linear-systems transfer theory. The main difference from the conventional homogeneous scintillator detector is the additional x-ray quantum sampling process at the beginning stage of the cascaded model. The additional sampling stage is expressed as a multiplication of the fill factor of the pixelated scintillator both in signal and noise. The numerical simulation shows that, while the detective quantum efficiency (DQE) degrades in the low spatial-frequency band due to the x-ray quantum sampling, the DQE maintains high values in the high-frequency band, which is due to the band-limited modulation-transfer function (MTF) property of the pixelated scintillator. The pixelated scintillator design is relatively insensitive to additive electronic noise in the DQE performance compared to the conventional design. As a potential solution to overcome the reduction of DQE in the low-frequency band with the pixelated scintillator design, we propose a partially pixelated scintillator design, which utilizes the concept of pre-filtering before the sampling process of the incident x-ray quanta.-
dc.languageEnglish-
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC-
dc.subjectMODULATION TRANSFER-FUNCTION-
dc.subjectQUANTUM EFFICIENCY-
dc.subjectDIGITAL RADIOGRAPHY-
dc.subjectAMORPHOUS SELENIUM-
dc.subjectSPATIAL-RESOLUTION-
dc.subjectNOISE-PROPAGATION-
dc.subjectDESCRIBE NOISE-
dc.subjectLARGE-AREA-
dc.subjectSYSTEMS-
dc.subjectSIGNAL-
dc.titleCascade modeling of pixelated scintillator detectors for x-ray imaging-
dc.typeArticle-
dc.identifier.wosid000256967800064-
dc.identifier.scopusid2-s2.0-45849144085-
dc.type.rimsART-
dc.citation.volume55-
dc.citation.issue3-
dc.citation.beginningpage1357-
dc.citation.endingpage1366-
dc.citation.publicationnameIEEE TRANSACTIONS ON NUCLEAR SCIENCE-
dc.identifier.doi10.1109/TNS.2008.919260-
dc.contributor.localauthorCho, Gyuseong-
dc.contributor.nonIdAuthorKim, Ho Kyung-
dc.contributor.nonIdAuthorYun, Seung Man-
dc.contributor.nonIdAuthorKo, Jong Soo-
dc.contributor.nonIdAuthorGraeve, Thorsten-
dc.type.journalArticleArticle; Proceedings Paper-
dc.subject.keywordAuthorcascade model-
dc.subject.keywordAuthordetective quantum efficiency-
dc.subject.keywordAuthorlinear-systems transfer theory-
dc.subject.keywordAuthorpixelated scintillator-
dc.subject.keywordPlusMODULATION TRANSFER-FUNCTION-
dc.subject.keywordPlusQUANTUM EFFICIENCY-
dc.subject.keywordPlusDIGITAL RADIOGRAPHY-
dc.subject.keywordPlusAMORPHOUS SELENIUM-
dc.subject.keywordPlusSPATIAL-RESOLUTION-
dc.subject.keywordPlusNOISE-PROPAGATION-
dc.subject.keywordPlusDESCRIBE NOISE-
dc.subject.keywordPlusLARGE-AREA-
dc.subject.keywordPlusSYSTEMS-
dc.subject.keywordPlusSIGNAL-
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