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Radiation Protection Dosimetry Advance Access originally published online on July 6, 2007
Radiation Protection Dosimetry 2007 126(1-4):185-189; doi:10.1093/rpd/ncm039
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Two-dimensional dosimetry of radiotherapeutical proton beams using thermoluminescence foils

L. Czopyk1,*, M. Klosowski1, P. Olko1, J. Swakon1, M. P. R. Waligorski1, T. Kajdrowicz2, G. Cuttone3, G. A. P. Cirrone3 and F. Di Rosa4

1 Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
2 Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, Poland
3 INFN, Catania, Italy
4 CSFNSM, Catania, Italy

* Corresponding author: lukasz.czopyk{at}ifj.edu.pl

In modern radiation therapy such as intensity modulated radiation therapy or proton therapy, one is able to cover the target volume with improved dose conformation and to spare surrounding tissue with help of modern measurement techniques. Novel thermoluminescence dosimetry (TLD) foils, developed from the hot-pressed mixture of LiF:Mg,Cu,P (MCP TL) powder and ethylene-tetrafluoroethylene (ETFE) copolymer, have been applied for 2-D dosimetry of radiotherapeutical proton beams at INFN Catania and IFJ Krakow. A TLD reader with 70 mm heating plate and CCD camera was used to read the 2-D emission pattern of irradiated foils. The absorbed dose profiles were evaluated, taking into account correction factors specific for TLD such as dose and energy response. TLD foils were applied for measuring of dose distributions within an eye phantom and compared with predictions obtained from the MCNPX code and Eclipse Ocular Proton Planning (Varian Medical Systems) clinical radiotherapy planning system. We demonstrate the possibility of measuring 2-D dose distributions with point resolution of about 0.5 x 0.5 mm2.


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