Research Article Open Access

The Impact of XRF-Escape on Energy Resolution of NaI: Tl Scintillation Detectors for Medical Imaging or Gamma-Ray Spectroscopy

Raffaele Scafè1, Marco Puccini2, Rosanna Pellegrini3 and Roberto Pani1
  • 1 Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy
  • 2 TERIN-ICT, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
  • 3 Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy

Abstract

The effect of escape of X-ray fluorescence from scintillator elemental components on the detector energy resolution is investigated from a spectroscopic standpoint, for monolithic and pixelated crystals. Along with these, any other emissions in a given region of interest were also considered. In present spectral evaluations a range of ratios between the areas of the peaks (XRFesc) to (XRFesc + photoelectric) has been a priori set from 0-50%, according to literature indications, by 10% steps. At the upper extremes of these ratio values, maximum worsening in energy resolution values just below 40%, just above 10% and just below 10% have been estimated for the interest regions of Tc-99 and F-18e Cs-137, respectively. The inter-crystal XRF-escape is suggested to be considered among the effects producing image blurring in segmented scintillators due to the spread of events between neighbor pixels

American Journal of Applied Sciences
Volume 21 No. 1, 2024, 28-40

DOI: https://doi.org/10.3844/ajassp.2024.28.40

Submitted On: 8 December 2023 Published On: 10 July 2024

How to Cite: Scafè, R., Puccini, M., Pellegrini, R. & Pani, R. (2024). The Impact of XRF-Escape on Energy Resolution of NaI: Tl Scintillation Detectors for Medical Imaging or Gamma-Ray Spectroscopy. American Journal of Applied Sciences, 21(1), 28-40. https://doi.org/10.3844/ajassp.2024.28.40

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Keywords

  • Gamma-Ray Scintillation Detector
  • XRF-Escape
  • SPECT
  • PET
  • Inter-Crystal Interactions