Implementation of a procedure for calibrating parallel plate ionization chambers in energy X-ray beams
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2024
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INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th
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Radiotherapy can be a low-cost method of treating cancer if appropriate diagnostic and therapeutic
equipment, associated with well-trained staff, is available. Among the various modalities available for
treatment, intraoperative radiotherapy (IORT) is a good option as it is a method based on a high dose of
radiation administered to the tumor bed immediately after surgical excision, thus reducing treatment
time.[1,2]
IORT can be obtained using miniature accelerators capable of producing low-energy X-rays with
voltages ranging from 30 to 50 kilovolts, for example, in the ZEISS INTRABEAM system (Carl Zeiss
Meditec AG, Jena, Germany) present in hospitals such as Oswaldo Cruz and AC.Camargo in São Paulo,
Brazil. [3]
One of the difficulties related to this system is carrying out adequate dosimetry and calibration of the
system. According to the recently updated TRS 398 recommendations, 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. [4]
Thus, this work aimed to establish a calibration procedure for parallel plate ionization chambers in
terms of absorbed dose in water at the Ionizing Radiation Metrology Center (CEMRI) at the Institute for
Energy and Nuclear Research (IPEN). To confirm the procedure, the calibration of 4 parallel plate
ionization chambers was carried out, including one belonging to a private hospital.
Como referenciar
DIAS, F.S.; JUNIOR RODRIGUES, O.; POTIENS, M.P.A. Implementation of a procedure for calibrating parallel plate ionization chambers in energy X-ray beams. In: PESSANHA, SOFIA (ed.); MANSO, MARTA (ed.). In: INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th, September 1-5, 2024, Lisbon, Portugal. Abstract... Lisbon, Portugal: Universidade Nova de Lisboa - Faculdade de Ciências e Tecnologia, 2024. p. 79-79. Disponível em: https://repositorio.ipen.br/handle/123456789/48969. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.