On the reliability of 3D gel dosimetry

Y. De Deene, J. Vandecasteele

Research output: Contribution to journalConference paperpeer-review

21 Citations (Scopus)
36 Downloads (Pure)


Gel dosimetry has a unique role to play in safeguarding conformal radiotherapy treatments as it covers the whole treatment chain and provides the radiation oncologist with the integrated dose distribution in 3D. A major obstacle that has hindered the wider dissemination of polymer gel dosimetry in radiotherapy centres is the lack of confidence in the reliability of the measured dose. Discrepancies in dose response of small versus large polymer gel dosimeters have been reported and although several hypothesis for these discrepancies have been postulated, the actual contribution of these error sources to the overall inaccuracy of the dose maps has not been determined. Several gel dosimetry research groups have chosen to use an internal calibration of gel dosimeters. In this study, the inter-and intra-batch reproducibility of the current state-of-the-art 3D gel dosimeters has been assessed. It is demonstrated that with a carefully designed scanning set-up, the overall accuracy that can be obtained with an independent calibration is well within 5% of all pixels.

Original languageEnglish
Article number012015
Pages (from-to)1-30
Number of pages30
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2013
Externally publishedYes
Event7th International Conference on 3D Radiation Dosimetry (IC3DDose) - Sydney, Australia, Sydney
Duration: 4 Nov 20128 Nov 2012

Bibliographical note

Copyright the Author(s) [or listed copyright owners]. First published in Journal of Physics: Conference Series 444 paper 012015. The original publication is available at doi:10.1088/1742-6596/444/1/012015, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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