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A Monte Carlo study of the energy dependence of Al2O3 : C crystals for real-time in vivo dosimetry in mammography

Aznar, M C; Medin, Joakim LU ; Hemdal, Bengt LU ; Klang, A T; Botter-Jensen, L and Mattsson, Sören LU (2005) In Radiation Protection Dosimetry 114(1-3). p.444-449
Abstract
In a previous experimental study, a novel method for in vivo dosimetry has been investigated, based on radioluminescence (RL) and optically stimulated luminescence (OSL). However, because of (fie large difference in atomic composition between the detector material and the breast tissue, relatively large energy dependence in low-energy X-ray beams can be expected. In the present work, the energy dependence of Al2O3:C crystals was modelled with the Monte Carlo code EGSnre using three types of X-ray spectra. The results obtained (5.6-7.3%) agree with a previously determined experimental result (9%) within the combined standard uncertainty of the two methods. The influence of the size of the crystal on the energy dependence was investigated... (More)
In a previous experimental study, a novel method for in vivo dosimetry has been investigated, based on radioluminescence (RL) and optically stimulated luminescence (OSL). However, because of (fie large difference in atomic composition between the detector material and the breast tissue, relatively large energy dependence in low-energy X-ray beams can be expected. In the present work, the energy dependence of Al2O3:C crystals was modelled with the Monte Carlo code EGSnre using three types of X-ray spectra. The results obtained (5.6-7.3%) agree with a previously determined experimental result (9%) within the combined standard uncertainty of the two methods. The influence of the size of the crystal on the energy dependence was investigated together with the effect of varying the thickness of the surrounding light-protective material. The results obtained indicate a minor effect owing to the thickness of the light-protective material, and a somewhat larger effect from reducing the diameter of the crystal. The outcome of this study can be used to improve the future design of the RL/OSI. dosimetry system for use in mammography. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Radiation Protection Dosimetry
volume
114
issue
1-3
pages
444 - 449
publisher
Nuclear Technology Publishing
external identifiers
  • wos:000229927400080
  • pmid:15933153
  • scopus:21244448024
ISSN
1742-3406
DOI
10.1093/rpd/nch560
language
English
LU publication?
yes
id
45e45f78-8ad0-4d08-bc6a-914baf64668b (old id 234174)
date added to LUP
2007-08-02 11:41:28
date last changed
2017-01-01 06:49:33
@article{45e45f78-8ad0-4d08-bc6a-914baf64668b,
  abstract     = {In a previous experimental study, a novel method for in vivo dosimetry has been investigated, based on radioluminescence (RL) and optically stimulated luminescence (OSL). However, because of (fie large difference in atomic composition between the detector material and the breast tissue, relatively large energy dependence in low-energy X-ray beams can be expected. In the present work, the energy dependence of Al2O3:C crystals was modelled with the Monte Carlo code EGSnre using three types of X-ray spectra. The results obtained (5.6-7.3%) agree with a previously determined experimental result (9%) within the combined standard uncertainty of the two methods. The influence of the size of the crystal on the energy dependence was investigated together with the effect of varying the thickness of the surrounding light-protective material. The results obtained indicate a minor effect owing to the thickness of the light-protective material, and a somewhat larger effect from reducing the diameter of the crystal. The outcome of this study can be used to improve the future design of the RL/OSI. dosimetry system for use in mammography.},
  author       = {Aznar, M C and Medin, Joakim and Hemdal, Bengt and Klang, A T and Botter-Jensen, L and Mattsson, Sören},
  issn         = {1742-3406},
  language     = {eng},
  number       = {1-3},
  pages        = {444--449},
  publisher    = {Nuclear Technology Publishing},
  series       = {Radiation Protection Dosimetry},
  title        = {A Monte Carlo study of the energy dependence of Al2O3 : C crystals for real-time in vivo dosimetry in mammography},
  url          = {http://dx.doi.org/10.1093/rpd/nch560},
  volume       = {114},
  year         = {2005},
}