Numerical dosimetry of a uterus with copper IUD undergoing Co-60 radiotherapy treatment
DOI:
https://doi.org/10.29384/rbfm.2023.v17.19849001704Keywords:
intrauterine device (IUD), cervical cancer, MCNP, Cobalt 60Abstract
Intrauterine devices (IUDs) are one of the most common and effective methods of contraception worldwide. Occasionally, women of reproductive age undergo radiotherapy with the implanted device due to the non-possibility of removal caused by invasive cervical cancer. In those cases, the IUD may interact with the radiation beam leading to changes in the dose delivery planned for the treatment. Therefore, it is important to understand the implications of the presence of IUD implant during radiotherapy. Given that, this work focuses on the evaluation of the energy deposited in the uterus in treatment situations with a Co-60 radiotherapy source through computational simulations, calculated by Monte Carlo N-Particle 6.2 (MCNP6.2) software. The software ParaView 5.10.1 was used to visualize the energy deposition on the simulated structures. The results show that when the IUD is present, a small change was observed in the energy deposited in the tissues. Nevertheless, there was radiation scattering and alteration in the values of the energy deposited in the region where the IUD was inserted. These changes are mainly caused by the Compton and Photoelectric effects that are enhanced by the higher density of copper parts of the IUD.
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