Dosimetric verification of radiotherapy treatment planning system at TMSS Cancer Center, Bogura, Bangladesh
1 Department of Medical Physics and Biomedical Engineering, Gono Bishwabidyalay, Savar, Bangladesh.
2 Medical Physics Division, Atomic Energy Centre, Dhaka, Bangladesh Atomic Energy Commission, Bangladesh.
3 Thengamara Mohila Sabuj Sangha (TMSS) Cancer Center, Bogura, Bangladesh.
Research Article
World Journal of Advanced Engineering Technology and Sciences, 2023, 10(02), 120–126.
Article DOI: 10.30574/wjaets.2023.10.2.0289
Publication history:
Received on 02 October 2023; revised on 01 December 2023; accepted on 04 December 2023
Abstract:
Authentication of TPS is the component of the QA program for RTPS and planning process. So, verification of dose calculation algorithm is essential to measure the efficiency of the dose calculations. The goal is to assess how far the dosage measured deviates from the dose predicted by the treatment planning system (TPS) algorithm using a CIRS Thorax phantom. It has been done to measure the dosimetric variations of 6MV, 10MV and 15MV photon beams. The phantom was initially scanned using a CT-simulator, and the raw data from the gated scans were then exported to TPS to perform the planning. Using this planning, the phantom was irradiated for four different cases. The computed dose was then compared with the measured dose to ensure TPS validity. The findings demonstrate that the variation between the measured doses in altered holes of the CIRS thorax phantom and the calculated doses by TPS was within the allowed limit except few points of four cases. Max. and Min. deviations for 6MV were 3.87% and 0.05% respectively. On the other hand, Max. and Min. deviations for 10MV were 7.87% and 0.12% respectively and that for 15MV are 4.44% and 0.02% respectively. Satisfactory results were obtained for lung and bone substitute. The results demonstrate the accuracy of the doses determined by the treatment planning system algorithm using a thorax phantom, and they also demonstrate the competency of using the phantom for regular verification. In case of external beam radiation therapy with AAA algorithm, the CIRS Thorax Phantom is suitable for dose computation in heterogeneous medium. However it is more compatible for 6MV than 10MV and 15MV.
Keywords:
Vital-Beam LINAC; Radiotherapy; Commissioning; Eclipse Treatment Planning System
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Copyright © 2023 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0