https://doi.org/10.1140/epjp/s13360-025-06392-z
Regular Article
Gafchromic EBT2 film dosimetry in transmission and reflection modes: a comparative dosimetry study
1
Physics Department, Hakim Sabzevari University, Sabzevar, Iran
2
Medical Physics and Radiological Sciences Department, Sabzevar University of Medical Sciences, Sabzevar, Iran
a Hamidreza.baghani@gmail.com, h.baghani@hsu.ac.ir
Received:
18
January
2025
Accepted:
1
May
2025
Published online:
31
May
2025
Transmission and reflection film scanning techniques can lead to different dosimetry results. Current study aims to evaluate which mode can provide more accurate results during the film dosimetry of high-energy photon beam. Two distinct EBT2 film dosimetry systems, based on transmission and reflection modes, were developed. Then, the accuracy of introduced film dosimetry systems was evaluated by comparing the film results with those measured by ionometric dosimetry inside the water. A third-ordered polynomial dose–response function was desirably fitted to calibration data in both modes (Adjusted R-squares > 0.99) with minimal dose residual analyses. Transmission mode showed superior dose measurement accuracy than reflection mode, where 1.7% and 7.5% mean differences respect to ionometric dosimetry were, respectively, found. Transmission mode leads to more accurate results respect to the reflection mode during EBT2 film dosimetry. Nevertheless, employed scanner type can also contribute to final result. Hence, accuracy evaluation should be separately performed using different scanners.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
