Τίτλος:
Evaluation of the GSO : Ce scintillator in the X-ray energy range from
40 to 140 kV for possible applications in medical X-ray imaging
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The purpose of the present study was to evaluate, under X-ray medical
imaging conditions, the X-ray luminescence efficiency (XLE) and the
optical quantum gain (OQG) of the Gd2SiO5:Ce scintillator in single
crystal form, suitable for tomographic applications. Intrinsic physical
properties and light emission characteristics of the Gd2SiO5:Ce
scintillator, were also studied. Both experimental and Monte Carlo
techniques were used. Various X-ray tube voltages (40-140 kV), currently
employed in X-ray imaging applications, were used. XLE was found to vary
slowly with X-ray tube voltage from (0.021 +/- 0.003) to (0.017 +/-
0.003). OQG varied from (317 +/- 18) to (466 +/- 23) light photons per
incident X-ray. These values were adequately high for imaging
applications using the particular energy range. Additionally, it was
found by Monte Carlo simulations that for crystal thicknesses higher
than 0.5 cm both XLE and OQG reached saturation levels, indicating that
higher thickness crystals are of no practical use in X-ray medical
imaging. (c) 2006 Elsevier B.V. All rights reserved.
Συγγραφείς:
Nikolopoulos, D.
Valais, I.
Kandarakis, I.
Cavouras, D. and
Linardatos, D.
Sianoudis, I.
Louizi, A.
Dimitropoulos, N.
and Vattis, D.
Episkopakis, A.
Nomicos, C.
Panayiotakis, G.
Περιοδικό:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION
A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Λέξεις-κλειδιά:
scintillators; X-ray imaging; luminescence efficiency; radiation
detectors
DOI:
10.1016/j.nima.2005.12.245
