Comparison of three film analysis softwares using EBT2 and EBT3 films in radiotherapy
Article Category: Research Article
Published Online: Aug 05, 2020
Page range: 505 - 512
Received: Feb 23, 2020
Accepted: Jun 27, 2020
DOI: https://doi.org/10.2478/raon-2020-0049
© 2020 Tamás Pócza, Zsuzsánna Zongor, Barbara Melles-Bencsik, Dóra Zita Tatai-Szabó, Tibor Major, Csilla Pesznyák, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Introduction
The purpose of the study was to compare the results of gamma value based film analysis according to the used type of self-developer film and software product.
Material and methods
The films were irradiated with different treatment techniques such as 3D conformal and intensity modulated radiotherapy with static and rotational delivery. Stereotactic plans with conformal and intensity modulated arc techniques, using coplanar and non-coplanar beam setup were also evaluated. The data of irradiated film were compared with the planned planar dose distribution exported from the treatment planning system. Three film analysis software programs were evaluated: PTW Mephysto (PTW), FilmQA Pro (FQP) and
Results
The results of the gamma analysis for larger fields were between 78.3% and 98.3%, 75.7% and 100%, 80.2% and 98.8% with PTW, FQP and RC, respectively. The results of evaluation in case of stereotactic measurements were 76.8%–99.2% for PTW, 95.7%–100% for FQP and 91.2%–99.9% for RC.
Conclusions
All the three software programs are suitable for calibrating and evaluating films, performing gamma analysis, and can be used for patient specific quality assurance measurements. There is no direct connection between gamma passing rate and absolute accuracy or software quality, it is just a feature of the software. The interpretation of own results has to be defined on an institutional level according to given workflow and preliminary results.