Mobile shielding evaluation on the fetal dose during a breast radiotherapy using Monte Carlo simulation

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.

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“…cm²) and the other using the MLC technique in a 3D-CRT treatment. The radiation field was directed to the left breast [18].…”

Section: Number Of Particle Histories and Relative Errorsmentioning

confidence: 99%

Dosimetric assessment and secondary cancer risk in breast radiotherapy: a Monte Carlo approach

Alva-Sánchez

Faés²,

Santos³

et al. 2022

Braz. J. Rad. Sci.

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Out-of-field organ doses and associated risk of cancer development following radiation therapy with photons

Mazonakis

Damilakis

2021

Physica Medica

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A review on fetal dose in Radiotherapy: A historical to contemporary perspective

et al. 2023

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Mobile shielding evaluation on the fetal dose during a breast radiotherapy using Monte Carlo simulation

Cited by 3 publications

References 25 publications

Dosimetric assessment and secondary cancer risk in breast radiotherapy: a Monte Carlo approach

Dosimetric assessment and secondary cancer risk in breast radiotherapy: a Monte Carlo approach

Out-of-field organ doses and associated risk of cancer development following radiation therapy with photons

A review on fetal dose in Radiotherapy: A historical to contemporary perspective

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