Efficiency of Luminescence of (Lu,Gd)2SiO5:Ce (LGSO:Ce) Crystal Sensory Material in the X-Ray Imaging Range

  • C. Michail
  • I. Valais
  • S. David
  • A. Bakas
  • N. Kalivas
  • G. Fountos
  • I. Kandarakis
  • Panayotis H. Yannakopoulos
  • D. Nikolopoulos
Conference paper
Part of the NATO Science for Peace and Security Series B: Physics and Biophysics book series (NAPSB)


The aim of the present study was to investigate the absolute luminescence efficiency (AE) of mixed oxyorthosilicate (Lu,Gd)2SiO5:Ce (LGSO:Ce) single crystals, under X-ray irradiation. Six (Lu,Gd)2SiO5:Ce crystal samples, with dimensions of 3 × 3 × 5, 3 × 3 × 6, 3 × 3 × 10, 3 × 3 × 15, 10 × 10 × 10 and 10 × 10 × 20 mm3 were examined. The light emitted by the crystals, was evaluated by performing measurements of the AE under X-ray exposure conditions, with tube voltages ranging from 50 to 130 kV. Results were compared with previously published data for GSO:Ce and LSO:Ce crystals. The spectral compatibility of the (Lu,Gd)2SiO5:Ce crystal, with various existing optical detectors, was investigated after emission spectra measurements. Absolute efficiency was found maximum at 130 kVp for the 3 × 3 × 15 mm3 (Lu,Gd)2SiO5:Ce crystal (25.40 E.U). AE of the 10 × 10 × 10 mm3 (Lu,Gd)2SiO5:Ce crystal was found higher than both GSO:Ce and LSO:Ce crystals, in the whole X-ray tube range. The emission spectrum of (Lu,Gd)2SiO5:Ce is excellent matched with the spectral sensitivities of photocathodes and silicon photomultipliers often employed in radiation detectors. Considering the high luminescence efficiency values and the spectral compatibility with the various photodetectors, (Lu,Gd)2SiO5:Ce crystal could be considered for use in combined medical imaging detectors i.e. integrated PET/CT detectors.


Inorganic scintillators Radiation detectors (Lu,Gd)2SiO5:Ce 


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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • C. Michail
    • 1
  • I. Valais
    • 1
  • S. David
    • 1
  • A. Bakas
    • 2
  • N. Kalivas
    • 1
  • G. Fountos
    • 1
  • I. Kandarakis
    • 1
  • Panayotis H. Yannakopoulos
    • 3
  • D. Nikolopoulos
    • 3
  1. 1.Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, Department of Biomedical EngineeringTechnological Educational Institute of AthensEgaleo, AthensGreece
  2. 2.Department of Medical Radiologic TechnologyTechnological Educational Institute of AthensAthensGreece
  3. 3.Department of Electronic Computer Systems EngineeringPiraeus University of Applied SciencesAigaleoGreece

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