Effectiveness of Al2O3:C OSL dosimeter towards entrance surface dose measurement in common X-ray diagnostics

Y. Musa, S. Hashim, S. K. Ghoshal, N. E. Ahmad, D. A. Bradley, M. K.A. Karim, Akmal Sabarudin

Research output: Contribution to journalArticle

Abstract

We report the successful use of nanoDots Optically Stimulated Luminescence Dosimeters (OSLDs) for the determination of the entrance surface dose (ESD) in common X-ray diagnostics. ESD evaluation is made on six radiographic projections including abdomen (AP and LAT), chest (AP and PA), skull (AP), and thoracic spine (AP). Indirect and direct ESD measurements have been performed with and without whole-body anthropomorphic phantom using GE radiography system installed at the Diagnostic Imaging Laboratory, Universiti Kebangsaan Malaysia (UKM), wherein the International Atomic Energy Agency protocol (IAEA TRS-457) has been followed. The CALDose_X 5.0 software is used to calculate ESDs in these projections. The mean ESDs obtained with indirect measurements for AP abdomen, LAT abdomen, AP chest, PA chest, AP thoracic spine, and AP skull projections are 4.8, 8.3, 0.7, 0.2, 7.2, and 3.7 mGy respectively, and with direct measurements, the respective mean ESDs are 4.3, 8.3, 0.7, 0.3, 6.8, and 2.8 mGy. The values obtained by CALDose_X calculations are 8.3, NA, 1.1, 0.7, 8.8, and 4.5 mGy, respectively. Significant variations ranging from 18% to 59% are observed between measured and calculated ESDs, which are attributed to the difference in phantom size and field size. The overall uncertainty for direct measurements has a maximum of ±0.86 mGy compared to ±0.47 mGy for indirect measurement. Measured ESDs are within the IAEA and European Commission (EC) DRLs range, while calculated ESDs are slightly above the measured values. It is concluded that the use of nanoDots OSLD is beneficial for ESD measurement in routine X-ray examinations.

Original languageEnglish
Article number108418
JournalRadiation Physics and Chemistry
Volume165
DOIs
Publication statusPublished - 1 Dec 2019

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entrances
dosimeters
dosage
abdomen
chest
x rays
skull
spine
projection
luminescence
Malaysia
radiography
nuclear energy
examination
computer programs
evaluation

Keywords

  • DRLs
  • ESD
  • OSLD
  • Radiography
  • X-ray diagnostic

ASJC Scopus subject areas

  • Radiation

Cite this

Effectiveness of Al2O3:C OSL dosimeter towards entrance surface dose measurement in common X-ray diagnostics. / Musa, Y.; Hashim, S.; Ghoshal, S. K.; Ahmad, N. E.; Bradley, D. A.; Karim, M. K.A.; Sabarudin, Akmal.

In: Radiation Physics and Chemistry, Vol. 165, 108418, 01.12.2019.

Research output: Contribution to journalArticle

Musa, Y. ; Hashim, S. ; Ghoshal, S. K. ; Ahmad, N. E. ; Bradley, D. A. ; Karim, M. K.A. ; Sabarudin, Akmal. / Effectiveness of Al2O3:C OSL dosimeter towards entrance surface dose measurement in common X-ray diagnostics. In: Radiation Physics and Chemistry. 2019 ; Vol. 165.
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