Evaluation of a special parallel-plate ionization chamber in standard mammography beams
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Applied Radiation and Isotopes
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The aim of this work was to verify the possibility of the application of a special parallel-plate ionization chamber,
developed at the Calibration Laboratory (IPEN), for mammography dosimetry. The homemade chamber has a
polymethyl methacrylate body, 10 cm of sensitive length, and a sensitive volume of 3.2 cm3. Its entrance window
is a foil of Mylar and its collecting electrode is made of graphite. Some quality control and characterization tests
were applied to evaluate the ionization chamber: short- and medium-term stabilities, leakage current, saturation,
ion collection efficiency, polarity effect, stabilization time, linearity of response, angular dependence, and energy
dependence. The tests were carried out using mammography standard radiation beams and a90Sr + 90Y check
source. All the results obtained were within the international recommended limits.
Como referenciar
SOARES, CLIMERIO S.; CALDAS, LINDA V.E. Evaluation of a special parallel-plate ionization chamber in standard mammography beams. Applied Radiation and Isotopes, v. 225, p. 1-5, 2025. DOI: 10.1016/j.apradiso.2025.111991. Disponível em: https://repositorio.ipen.br/handle/123456789/49341. Acesso em: 20 Mar 2026.
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.