Affiliations 

  • 1 Centre for Radiation Sciences, Sunway University, 46150 PJ, Malaysia; Department of Physics, University of Surrey, Guildford GU2 7XH, UK. Electronic address: d.a.bradley@surrey.ac.uk
  • 2 Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100 Cyberjaya, Malaysia
  • 3 Centre for Radiation Sciences, Sunway University, 46150 PJ, Malaysia
  • 4 Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
Appl Radiat Isot, 2018 Nov;141:176-181.
PMID: 29673719 DOI: 10.1016/j.apradiso.2018.02.025

Abstract

In previous work we investigated the real-time radioluminescence (RL) yield of Ge-doped silica fibres and Al2O3 nanodot media, sensing electron- and x-ray energies and intensities at values familiarly obtained in external beam radiotherapy. The observation of an appreciable low-dose sensitivity has given rise to the realisation that there is strong potential for use of RL dosimetry in diagnostic radiology. Herein use has been made of P-doped silica optical fibre, 2 mm diameter, also including a 271 µm cylindrical doped core. With developing needs for versatile x-ray imaging dosimetry, preliminary investigations have been made covering the range of diagnostic x-ray tube potentials 30 kVp to 120 kVp, demonstrating linearity of RL with kVp as well as in terms of the current-time (mAs) product. RL yields also accord with the inverse-square law. Given typical radiographic-examination exposure durations from tens- to a few hundred milliseconds, particular value is found in the ability to record the influence of x-ray generator performance on the growth and decay of beam intensity, from initiation to termination.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.