Characterization of applicator material for treatment of superficial lesions in brachytherapy
DOI:
https://doi.org/10.15392/2319-0612.2024.2611Keywords:
Brachytherapy, superficial lesions, dimethyl polysiloxane, applicatorAbstract
The treatment of superficial lesions by brachytherapy is performed using radioactive sources positioned inside tumors or at a short distance from them, to deposit the prescribed dose in the target volume. In the case of treating skin lesions, due to the proximity between the source and the patient's surface, it is important to use applicators that conduct the radiation source to the region to be treated, ensuring the safety and hygiene of the process. The treatment of keloids, for example, can be performed by brachytherapy. Considering that the applicators must undergo rigorous quality control, this study presents an evaluation of an applicator developed for the treatment of skin lesions, consisting of fifteen spheres of synthetic material, for use in High dose rate brachytherapy (HDR) equipment, model Nucletron Digital V3, equipped with an Ir-192 source. It was considered important to determine whether the spheres are suitable for medical use, direct contact with the patient's skin and sterilization methods. Furthermore, it was necessary to consider the material's resistance to the irradiation process, since the spheres must be used in multiple applications. In this sense, it was necessary to define the material of the spheres and, through this characterization, consider their suitability for the proposed use. Since the spheres were acquired with generic specifications, this study aimed to perform analyses to characterize the material, defining its composition. Consequently, the focus was to evaluate their safe use in the brachytherapy applicator.
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Copyright (c) 2024 Juan Carlos Chrisostomo Lamônica, Marcela Morais Freitas, Mariana Oliveira Reis, Luciana Batista Nogueira, Jony Marques Geraldo, Clara B Nascimento, Arnoldo Mafra, Adriana de Souza Medeiros Batista
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