Biology Department, University Echahid Hamma Lakhdar, El-oued
Algeria, Algeria
Laboratory SNIRM, Physics Faculty, University of Sciences and Technology Houari Boumediène, LP 32 El-Alia Bab Ezzouar, Algiers, Algeria
Introduction. For the monitoring of patient dose in external radiation therapy, the luminescent dosimeters are widely used, where the
physical processes of their three types (thermoluminescence (TLD),
radiophotoluminescence (RPL) and optically stimulated luminescence (OSL)) are very similar.
Purpose.The purpose of this work was to compare the dosimetric
proprieties of three kind of luminescent detectors, RPL glass dosimeter, commercially known as GD-301, with lithium fluoride TLD-100 (LiF:Mg,Ti) and carbon-doped aluminum oxide (Al2O3:C).
Methods and materials.In our study, a Monte Carlo simulation
with MCNP5 was carried out to estimate the responses of these dosimeters in terms of absorbed dose, output factor, the angular and
energy dependence.
Results.In this work we found that the difference between the
output factor was less than ±4.2% for the three dosimeters. The variations in sensitivity for angles up to ±80from the central axis of the
beam were approximately 1% and 1.5% for the GD-301 and Al2O3:C,
respectively. The energy dependence of the RPL and OSL dosimeters
were found to be within 1% and 3.1% for 6 and 15 MV X-ray beam,
respectively, for the TLD is stated as less than a 1.1% for the both
beams.
تاريخ النشر
03/09/2016
الناشر
Physica Medica - European Journal of Medical Physics
د. عبد الحي بن علي | Dr. Abdelhai Ben Ali | 5655