Evaluating scintillators used in radiation detectors of medical imaging systems by the effective fidelity index (EFI) method

dc.contributor.author	Κανδαράκης, Ιωάννης Σ.	el
dc.contributor.author	Κάβουρας, Διονύσης Α.	el
dc.contributor.author	Πρασόπουλος, Παναγιώτης Π.	el
dc.contributor.author	Κανελλόπουλος, Ε.	el
dc.contributor.author	Νομικός, Κωνσταντίνος Δ.	el
dc.date.accessioned	2015-05-05T09:09:26Z
dc.date.available	2015-05-05T09:09:26Z
dc.date.issued	2015-05-05
dc.identifier.uri	http://hdl.handle.net/11400/9721
dc.rights	An error occurred on the license name.	*
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	An error occurred getting the license - uri.	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.ejradiology.com/article/S0720-048X(98)00109-0/abstract	en
dc.subject	Scintillators
dc.subject	X-ray luminescence
dc.subject	Σπινθηριστές
dc.subject	X-ray φωταύγεια
dc.title	Evaluating scintillators used in radiation detectors of medical imaging systems by the effective fidelity index (EFI) method	en
heal.type	journalArticle
heal.classification	Medicine
heal.classification	Physics
heal.classification	Ιατρική
heal.classification	Φυσική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://skos.um.es/unescothes/C02994
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Φυσική
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85118713
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.identifier.secondary	DOI: http://dx.doi.org/10.1016/S0720-048X(98)00109-0
heal.language	en
heal.access	campus
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	1999
heal.bibliographicCitation	Kandarakis, I., Cavouras, D., Prassopoulos, P., Kanellopoulos, E., Nomicos, C., et al. (April 1999). Evaluating scintillators used in radiation detectors of medical imaging systems by the effective fidelity index (EFI) method. European Journal of Radiology. 30(1). pp. 61-66. Elsevier Inc: 1999. Available from: http://www.ejradiology.com/article/S0720-048X(98)00109-0/abstract	en
heal.abstract	Objective: The performance of medical X-ray image receptors depends: (1) on the scintillator light emission efficiency; and (2) on the compatibility of the scintillator light spectrum with the spectral sensitivity of the light detector (film, photocathode, or photodiode), employed in conjunction with the scintillator. In this study, a scintillator performance measure, the effective fidelity index (EFI), is defined as function of both the scintillator light emission efficiency and spectral compatibility. Materials and Method: CsI:Na, Gd2O2S:Tb and La2O2S:Tb scintillators were employed in the form of phosphor screens prepared in our laboratory with various coating thicknesses. The screens were irradiated with X-rays employing tube voltages ranging between 50–120 kVp. Results: The EFI performance of CsI:Na was found to increase with screen coating thickness and it was best when combined with the orthochromatic film or the ES/20 photocathode. Gd2O2S:Tb showed peak EFI performance at 70 mg/cm2 coating thickness and it was well combined with the light detectors considered. Conclusion: In accordance with our results, CsI:Na may be employed in radiography when adequately protected against humidity. Gd2O2S:Tb suitability for conventional imaging was verified and it was found that it may be useful in all types of digital imaging. La2O2S:Tb could also be used in digital detectors of imaging applications demanding medium X-ray tube voltages.	en
heal.publisher	Elsevier Inc	en
heal.journalName	European Journal of Radiology	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true