Electronic Brachytherapy: A Calibration Protocol in Terms of Absorbed Dose to Water"

Fábio Sabará Dias; Orlando Rodrigues Jr; Maria da Penha Albuquerque Potiens

doi:10.15392/2319-0612.2026.2992

Autores/as

Fábio Sabará Dias Instituto de Pesquisas Energéticas e Nucleares
Orlando Rodrigues Jr Instituto de Pesquisas Energéticas e Nucleares
Maria da Penha Albuquerque Potiens Instituto de Pesquisas Energéticas e Nucleares

DOI:

https://doi.org/10.15392/2319-0612.2026.2992

Palabras clave:

intraoperative radiotherapy, absorbed dose in water, dosimeter calibration, Ionizing Radiation Metrology

Resumen

New radiotherapy techniques have been innovative in recent decades with the aim of maximizing the dose to tumor tissue and reducing the dose to healthy tissue. One of the modalities that has gained prominence, using low-energy beams, is intraoperative radiotherapy (IORT), as it is a method based on high radiation doses (10–20 Gy) administered to the tumor bed immediately after surgical excision. IORT can be achieved through treatment with low-energy X-ray beams with some devices available on the market. However, such devices provide little dosimetric information and lack a calibration protocol. According to the recently updated recommendations of the TRS 398 standard (2024), for the use of low-energy beams, the ideal is to use a parallel plate ionization chamber calibrated in terms of absorbed dose in water. Based on TRS 398, this work established a calibration protocol for parallel plate dosimeters in terms of absorbed dose in water at the Center for Ionizing Radiation Metrology (CEMRI) of the Institute for Energy and Nuclear Research (IPEN).

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Biografía del autor/a

Fábio Sabará Dias, Instituto de Pesquisas Energéticas e Nucleares

Graduado em Tecnologia em Radiologia pela Universidade Federal de Minas Gerais (2013), mestrado em Ciências das Radiações - Programa de Pós-Graduação em Ciência e Tecnologia das Radiações, Minerais e Materiais no Centro de Desenvolvimento da Tecnologia Nuclear (2018), especialização em Radioterapia pela INACI / FINACI (2021). Atualmente doutorando no programa de Pós-Graduação em Tecnologia Nuclear no Instituto de Pesquisas Energéticas e Nucleares. Desenvolvo pesquisas na área de Física Médica, com ênfase em Metrologia das Radiações, Proteção Radiológica e Dosimetria, atuando principalmente nos temas: radioterapia, calibração de dosímetros, radiodiagnóstico médico e odontológico, proteção radiológica, controle de qualidade e dosímetros. Atualmente é docente das Especializações técnicas de Radioterapia e Mamografia e do curso Técnico de Radiologia do Senac Campinas

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