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Dose rate dependency of micelle leucodye 3D gel dosimeters

Jan Vandecasteele (UGent) , Sara Ghysel (UGent) and Yves De Deene (UGent)
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Abstract
Recently a novel 3D radiochromic gel dosimeter was introduced which uses micelles to dissolve a leucodye in a gelatin matrix. Experimental results show that this 3D micelle gel dosimeter was found to be dose rate dependent. A maximum difference in optical dose sensitivity of 70% was found for dose rates between 50 cGy min−1 and 400 cGy min−1. A novel composition of 3D radiochromic dosimeter is proposed composed of gelatin, sodium dodecyl sulphate, chloroform, trichloroacetic acid and leucomalachite green. The novel gel dosimeter formulation exhibits comparable radio-physical properties in respect to the composition previously proposed. Nevertheless, the novel formulation was found to be still dose rate dependent. A maximum difference of 33% was found for dose rates between 50 cGy min−1 and 400 cGy min−1. On the basis of these experimental results it is concluded that the leucodye micelle gel dosimeter is still unsatisfactory for clinical radiation therapy dose verifications. Some insights in the physico-chemical mechanisms were obtained and are discussed.
Keywords
Radiation dosimetry, 3D Dosimetry, Gel Dosimetry, Optical CT, Leucodye chemistry

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Chicago
Vandecasteele, Jan, Sara Ghysel, and Yves De Deene. 2010. “Dose Rate Dependency of Micelle Leucodye 3D Gel Dosimeters.” In Journal of Physics Conference Series. Vol. 250. Bristol, UK: IOP Publishing.
APA
Vandecasteele, J., Ghysel, S., & De Deene, Y. (2010). Dose rate dependency of micelle leucodye 3D gel dosimeters. JOURNAL OF PHYSICS CONFERENCE SERIES (Vol. 250). Presented at the 6th International conference on 3D Radiation Dosimetry, Bristol, UK: IOP Publishing.
Vancouver
1.
Vandecasteele J, Ghysel S, De Deene Y. Dose rate dependency of micelle leucodye 3D gel dosimeters. JOURNAL OF PHYSICS CONFERENCE SERIES. Bristol, UK: IOP Publishing; 2010.
MLA
Vandecasteele, Jan, Sara Ghysel, and Yves De Deene. “Dose Rate Dependency of Micelle Leucodye 3D Gel Dosimeters.” Journal of Physics Conference Series. Vol. 250. Bristol, UK: IOP Publishing, 2010. Print.
@inproceedings{1085252,
  abstract     = {Recently a novel 3D radiochromic gel dosimeter was introduced which uses micelles to dissolve a leucodye in a gelatin matrix. Experimental results show that this 3D micelle gel dosimeter was found to be dose rate dependent. A maximum difference in optical dose sensitivity of 70\% was found for dose rates between 50 cGy min\ensuremath{-}1 and 400 cGy min\ensuremath{-}1. A novel composition of 3D radiochromic dosimeter is proposed composed of gelatin, sodium dodecyl sulphate, chloroform, trichloroacetic acid and leucomalachite green. The novel gel dosimeter formulation exhibits comparable radio-physical properties in respect to the composition previously proposed. Nevertheless, the novel formulation was found to be still dose rate dependent. A maximum difference of 33\% was found for dose rates between 50 cGy min\ensuremath{-}1 and 400 cGy min\ensuremath{-}1. On the basis of these experimental results it is concluded that the leucodye micelle gel dosimeter is still unsatisfactory for clinical radiation therapy dose verifications. Some insights in the physico-chemical mechanisms were obtained and are discussed.},
  articleno    = {012009},
  author       = {Vandecasteele, Jan and Ghysel, Sara and De Deene, Yves},
  booktitle    = {JOURNAL OF PHYSICS CONFERENCE SERIES},
  issn         = {1742-6588},
  keyword      = {Radiation dosimetry,3D Dosimetry,Gel Dosimetry,Optical CT,Leucodye chemistry},
  language     = {eng},
  location     = {Hilton Head Island, SC, USA},
  number       = {1},
  pages        = {5},
  publisher    = {IOP Publishing},
  title        = {Dose rate dependency of micelle leucodye 3D gel dosimeters},
  url          = {http://dx.doi.org/10.1088/1742-6596/250/1/012009},
  volume       = {250},
  year         = {2010},
}

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