Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4514
Title: Evaluation of the light emission efficiency of LYSO:Ce scintillator under X-ray excitation for possible applications in medical imaging
Authors: Βαλαής, Ιωάννης Γ.
Κανδαράκης, Ιωάννης Σ.
Κωνσταντινίδης, Αναστάσιος Χ.
Νικολόπουλος, Δημήτριος Σ.
Σιανούδης, Ιωάννης Α.
Contributors: Κάβουρας, Διονύσης Α.
Δημητρόπουλος, Νικόλαος
Νομικός, Κωνσταντίνος Δ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Inorganic scintillators;Nuclear counters;Ανόργανοι σπινθηριστές;Ανιχνευτές ακτινοβολίας
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 22-Jan-2015
2006
Date of availability: 22-Jan-2015
Publisher: Elsevier Science Ltd
Abstract: Lutetium–yttrium-based scintillators, such as LYSO:Ce, have a high effective atomic number, are non-hygroscopic, fast emitting materials, and promising candidates for use in positron emission imagers. The present study investigates the light emission characteristics of (Lu, Y)2SiO5:Ce (LYSO:Ce) single-crystal scintillator under X-ray imaging conditions. Also, the parameters related to the luminescence emission spectrum and emission efficiency were studied using experimental methods. Various X-ray tube voltages currently employed in X-ray imaging techniques were used. Measurements were performed using an experimental set-up based on a photomultiplier coupled to an integration sphere. In addition, the emission spectrum under UV and X-ray excitation was measured using an optical grating monochromator to determine the spectral compatibility of optical photon detectors incorporated in medical imaging systems. The absolute efficiency of LYSO:Ce was found to increase with increasing X-ray tube voltage (from 2.2 EU at 22 kVp to 22.4 EU at 140 kVp), while its spectrum, peaking at about 430 nm, was found compatible with most optical detectors (photodiodes, photocathodes, charge coupled devices, etc.). The matching factor was estimated to range from 0.76 to 0.92 (for a silicon photodiode and for a GaAsP photocathode, respectively).
Description: Proceedings of the 3rd International Conference on Imaging Technologies in Biomedical Sciences -Innovation in Nuclear and Radiological Imaging: from Basic Research to Clinical Application
Language: English
Citation: Valais, I., Kandarakis, I., Konstantinidis, A., Nikolopoulos, D., Sianoudis, I., et al. (December 2006). Evaluation of the light emission efficiency of LYSO:Ce scintillator under X-ray excitation for possible applications in medical imaging. Nuclear Instruments and Methods in Physics Research A. 569(2). pp. 201–204. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 05/09/2006]
Journal: Nuclear Instruments and Methods in Physics Research A
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/4514
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