| Autor: |
Mirko Salomón Alva-Sánchez, Giulia Rita de Souza Faés, William de Souza Santos, Thatiane Alves Pianoschi Alva |
| Jazyk: |
English<br />Portuguese |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Brazilian Journal of Radiation Sciences, Vol 10, Iss 3 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2319-0612 |
| DOI: |
10.15392/bjrs.v10i3.2064 |
| Popis: |
To calculate the risk of secondary cancer induction resulting from this dose through a Monte Carlo simulation code and voxel-based anthropomorphic phantom to determine the radiation dose in organs and/or tissues with dosimetric importance and the effect of using static MLC in the 3D-CRT technique. In this work, a radiotherapy treatment of breast cancer was simulated using the radiation transport code MCNPX 2.7.0 and the adult anthropomorphic simulator FSTA_H50_M50. The absorbed doses for a set of organs with dosimetric importance were determined. A LINAC Varian 2100C device operated with two techniques was simulated: 2D with open field (OF) and 3D-conformational (3D-CRT), the latter with the use of a multilayer collimator (MLC) of the breast, both acting with 6 MV energy. The highest values of absorbed dose were obtained for the ipsilateral lung (7.22 Gy (3D-CRT) and 8.49 Gy (OF)) and the contralateral breast (6.29 Gy (3D-CRT) and 6.56 Gy (OF)), generating for these organs the greatest risks of secondary cancer induction. With the OF technique, due to the non-collimation of the beam, there was an increase in the absorbed dose in all organs compared to 3D-CRT, thus evidencing a more effective treatment with the 3D-CRT technique, improving both homogeneity and conformity with the dose absorbed in the target organ. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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