Evaluation of a real-time optically stimulated luminescence beryllium oxide (BeO) fibre-coupled dosimetry system with a superficial 140 kVp X-ray beam

Phys Med. 2019 Sep;65:167-171. doi: 10.1016/j.ejmp.2019.08.021. Epub 2019 Sep 5.

Abstract

The purpose of this study was to investigate the potential of real-time optically stimulated luminescence (rtOSL) measurements of a beryllium oxide (BeO) ceramic fibre-coupled luminescence dosimetry system. By pulsing the stimulation laser during the exposure to ionizing radiation, an rtOSL dose-rate measurement can be obtained which could be stem effect free. A portable rtOSL BeO ceramic fibre-coupled dosimetry system is presented and characterized using a constant dose-rate superficial 140 kVp X-ray beam. The rtOSL was measured for dose-rates between 0.29 and 3.88 Gy/min, controlled by varying the source to surface distance. After correcting for OSL decay during the exposure, a linear dose-rate response of the change in rtOSL (ΔrtOSL) was observed. The ΔrtOSL was also observed to be stem effect free.

Keywords: BeO ceramic; Fibre-coupled luminescence dosimetry; Optically stimulated luminescence; Stem effect.

Publication types

  • Evaluation Study

MeSH terms

  • Beryllium*
  • Optically Stimulated Luminescence Dosimetry*
  • Radiation Dosage
  • Time Factors
  • X-Rays

Substances

  • beryllium oxide
  • Beryllium