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Investigation and analysis of ferrous sulfate polyvinyl alcohol (PVA) gel dosimeter

Hill, Brendan ; Bäck, Sven LU ; Lepage, Martin ; Simpson, John ; Healy, Brendan and Baldock, Clive (2002) In Physics in Medicine and Biology 47(23). p.4233-4246
Abstract
Ferrous sulfate (Fe(SO4)2) PVA gels were investigated for a range of absorbed doses up to 20 Gy using both magnetic resonance imaging (MRI) and spectrophotometry to determine R1 and optical density (OD) dose responses and G values. It was found that R1- and OD-dose sensitivities increased with O2 saturation or by the introduction of a freeze-thaw cycle during preparation of the PVA gel. The storage temperature of the Fe(SO4)2 PVA gel at -18 degrees C increased R1-dose sensitivity above that of gels stored at 5 degrees C. The addition of sucrose to the formulation was found to result in the largest increase in both R1- and OD-dose sensitivities. Fe(SO4)2 PVA gel with and without the addition of xylenol orange was demonstrated to have a G... (More)
Ferrous sulfate (Fe(SO4)2) PVA gels were investigated for a range of absorbed doses up to 20 Gy using both magnetic resonance imaging (MRI) and spectrophotometry to determine R1 and optical density (OD) dose responses and G values. It was found that R1- and OD-dose sensitivities increased with O2 saturation or by the introduction of a freeze-thaw cycle during preparation of the PVA gel. The storage temperature of the Fe(SO4)2 PVA gel at -18 degrees C increased R1-dose sensitivity above that of gels stored at 5 degrees C. The addition of sucrose to the formulation was found to result in the largest increase in both R1- and OD-dose sensitivities. Fe(SO4)2 PVA gel with and without the addition of xylenol orange was demonstrated to have a G value of approximately 20 ions/100 eV and with sucrose approximately 24 ions/100 eV. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics in Medicine and Biology
volume
47
issue
23
pages
4233 - 4246
publisher
IOP Publishing
external identifiers
  • wos:000180279500010
  • scopus:0346736700
ISSN
1361-6560
DOI
10.1088/0031-9155/47/23/309
language
English
LU publication?
yes
id
dc8da7fd-e989-458e-bb5d-2ba6c3761cc2 (old id 1297442)
date added to LUP
2016-04-01 11:33:47
date last changed
2022-05-06 06:04:25
@article{dc8da7fd-e989-458e-bb5d-2ba6c3761cc2,
  abstract     = {{Ferrous sulfate (Fe(SO4)2) PVA gels were investigated for a range of absorbed doses up to 20 Gy using both magnetic resonance imaging (MRI) and spectrophotometry to determine R1 and optical density (OD) dose responses and G values. It was found that R1- and OD-dose sensitivities increased with O2 saturation or by the introduction of a freeze-thaw cycle during preparation of the PVA gel. The storage temperature of the Fe(SO4)2 PVA gel at -18 degrees C increased R1-dose sensitivity above that of gels stored at 5 degrees C. The addition of sucrose to the formulation was found to result in the largest increase in both R1- and OD-dose sensitivities. Fe(SO4)2 PVA gel with and without the addition of xylenol orange was demonstrated to have a G value of approximately 20 ions/100 eV and with sucrose approximately 24 ions/100 eV.}},
  author       = {{Hill, Brendan and Bäck, Sven and Lepage, Martin and Simpson, John and Healy, Brendan and Baldock, Clive}},
  issn         = {{1361-6560}},
  language     = {{eng}},
  number       = {{23}},
  pages        = {{4233--4246}},
  publisher    = {{IOP Publishing}},
  series       = {{Physics in Medicine and Biology}},
  title        = {{Investigation and analysis of ferrous sulfate polyvinyl alcohol (PVA) gel dosimeter}},
  url          = {{http://dx.doi.org/10.1088/0031-9155/47/23/309}},
  doi          = {{10.1088/0031-9155/47/23/309}},
  volume       = {{47}},
  year         = {{2002}},
}