Independent verification of treatment planning system calculations
, , , oraz | 08 cze 2021
Article Category: Original Paper
Data publikacji: 08 cze 2021
Zakres stron: 47 - 53
Otrzymano: 10 kwi 2019
Przyjęty: 02 lis 2020
DOI: https://doi.org/10.2478/nuka-2021-0006
Słowa kluczowe
© 2021 Edyta Dąbrowska-Szewczyk et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Purpose
According to the available international recommendations, at least one independent verification of the calculations of number of monitor unit (MU) is required for every patient treated by teleradiotherapy. The aim of this study was to estimate the differences of dose distributions calculated with two treatment planning systems: Eclipse (Varian) and Oncentra MasterPlan (Elekta).
Materials and methods
The analysis was performed for 280 three-dimensional conformal radiotherapy treatment (3D-CRT) plans with photon beams from Varian accelerators: CL 600C/D X6 MV (109 plans), CL 2300C/D X6 MV (43 plans), and CL 2300C/D X15 MV (128 plans). The mean doses in the planning target volume (PTV) and doses at the isocenter point obtained with Eclipse and Oncentra MasterPlan (OMP) were compared with Wilcoxon matched-pairs signed rank test. Additionally, the treatment planning system (TPS) calculations were compared with dosimetric measurements performed in the inhomogeneous phantom.
Results
Data were analysed for 6 MV plans and for 15 MV plans separately, independently of the treatment machine. The dose values calculated in Eclipse were significantly (
Conclusions
OMP calculations were introduced as the independent MU verification tool with the first action level range equal to 3.5%.