Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams
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Brazilian Journal of Radiation Sciences
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Ionization chambers are the reference detectors for electron beam dosimetry. In this paper a dedicated radiotherapy
plane parallel ionization chamber manufactured with low cost materials is presented for dosimetry in
electron beams. The ionization chamber tested has a sensitive volume of 0.4 cm³. Both the collecting electrode
and the guard ring were painted with a homogeneous mixture of nail polish and graphite. The dedicated ionization
chamber presented a linear response with electron absorbed dose within the range 0.5 to 8.0 Gy, an increase
of its response with the field size increasing, an angular dependence within ±5°, as recommended by international
standards, and a polarity effect of 0.78% according to the field size. Considering the results obtained, it is
possible to conclude that the plane parallel ionization chamber tested in this work presents potential use for elec -
tron beam dosimetry in clinical routine.
Como referenciar
SILVA, J.O.; NONATO, F.B.C.; SAMPAIO, F.G.A.; CALDAS, L.V.E. Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams. Brazilian Journal of Radiation Sciences, v. 6, n. 3, p. 1-13, 2018. DOI: 10.15392/bjrs.v6i3.547. Disponível em: http://repositorio.ipen.br/handle/123456789/29345. 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.