Luminescence efficiency of Lu2SiO5:Ce (LSO) powder scintillator for X-ray medical radiography applications

David, S; Michail, C; Valais, I; Nikolopoulos, D; Kalivas, N; Kalatzis, I; Karatopis, A; Cavouras, D; Loudos, G; Panayiotakis, GS; Kandarakis, I

dc.contributor.author	David, S	en
dc.contributor.author	Michail, C	en
dc.contributor.author	Valais, I	en
dc.contributor.author	Nikolopoulos, D	en
dc.contributor.author	Kalivas, N	en
dc.contributor.author	Kalatzis, I	en
dc.contributor.author	Karatopis, A	en
dc.contributor.author	Cavouras, D	en
dc.contributor.author	Loudos, G	en
dc.contributor.author	Panayiotakis, GS	en
dc.contributor.author	Kandarakis, I	en
dc.date.accessioned	2014-03-01T02:51:07Z
dc.date.available	2014-03-01T02:51:07Z
dc.date.issued	2007	en
dc.identifier.issn	10957863	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35378
dc.subject.other	Luminescence	en
dc.subject.other	Medical imaging	en
dc.subject.other	Radiation detectors	en
dc.subject.other	Scintillation	en
dc.subject.other	X ray radiography	en
dc.subject.other	Luminescence efficiency (AE)	en
dc.subject.other	Scintillating screens	en
dc.subject.other	X-ray detection	en
dc.subject.other	Lutetium	en
dc.title	Luminescence efficiency of Lu2SiO5:Ce (LSO) powder scintillator for X-ray medical radiography applications	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/NSSMIC.2006.356054	en
heal.identifier.secondary	http://dx.doi.org/10.1109/NSSMIC.2006.356054	en
heal.identifier.secondary	4179208	en
heal.publicationDate	2007	en
heal.abstract	This work investigates the light emission efficiency of Lu 2SiO5:Ce (LSO) powder scintillator under X-ray radiographic imaging conditions. Powder LSO scintillator has never been previously used in X-ray imaging. For the purposes of the present study three scintillating screens with coating thickness of 63.4, 108.4 and 172.5 mg/cm 2, were prepared by sedimentation of LSO powder. Absolute luminescence efficiency (AE) measurements were performed in the radiographic X-ray tube voltages (40-140 kVp) range. Parameters related to X-ray detection, i.e. energy absorption efficiency and quantum detection efficiency were calculated, A theoretical model, describing radiation and light transfer, was employed to fit experimental data and to estimate values of the intrinsic conversion efficiency and the light attenuation coefficients of the scintillating screens, The spectral compatibility of the LSO powder scintillator to various radiographic optical detectors was determined by performing light emission spectrum measurements and by taking into account the spectral sensitivity of the optical sensors used in digital radiography detectors. LSO was found to exhibit higher X-ray energy absorption than currently employed scintillators (CsI:Tl and Gd2O2S:Tb) in the range from 40 to 70 kVp. AE was found to increase with X-ray tube voltage up to 110 kVp. Maximum AE (8.2 10-6 W.s/mR.m2) was observed for the screen of 172.5 mg/cm2. © 2006 IEEE.	en
heal.journalName	IEEE Nuclear Science Symposium Conference Record	en
dc.identifier.doi	10.1109/NSSMIC.2006.356054	en
dc.identifier.volume	2	en
dc.identifier.spage	1178	en
dc.identifier.epage	1182	en