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Preparation of polymer gel dosimeters based on less toxic monomers and gellan gum.
- Source :
- Physics in Medicine & Biology; 10/21/2013, Vol. 58 Issue 20, p7131-7141, 11p
- Publication Year :
- 2013
-
Abstract
- New polymer gel dosimeters consisting of 2-hydroxyethyl methacrylate (HEMA), triethylene glycol monoethyl ether monomethacrylate (TGMEMA), polyethylene glycol 400 dimethacrylate (9G), tetrakis (hydroxymethyl) phosphonium chloride as an antioxidant, and gellan gum as a gel matrix were prepared. They were optically analyzed by measuring absorbance to evaluate a dose response. The absorbance of the polymer gel dosimeters that were exposed to <superscript>60</superscript>Co γ-rays increased with increasing dose. The dosimeters comprising HEMA and 9G showed a linear increase in absorbance in the dose range from 0 to 10 Gy. The dose response depended on the 9G concentration. For others comprising HEMA, 9G and TGMEMA, the absorbance of the polymer gel dosimeters drastically increased above a certain dose, and then leveled off up to 10 Gy. The optical variations in these polymer gel dosimeters were also induced by x-irradiation from Cyberknife radiotherapy equipment. Furthermore, the exposed region of the latter polymer gel dosimeter exhibited a thermo-responsive behavior. [ABSTRACT FROM AUTHOR]
- Subjects :
- POLYMER colloids
DOSIMETERS
RADIOTHERAPY
RADIATION
ABSORPTION
Subjects
Details
- Language :
- English
- ISSN :
- 00319155
- Volume :
- 58
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Physics in Medicine & Biology
- Publication Type :
- Academic Journal
- Accession number :
- 94292109
- Full Text :
- https://doi.org/10.1088/0031-9155/58/20/7131