Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams
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, an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2018-09-01
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| Series: | Brazilian Journal of Radiation Sciences |
| Subjects: | |
| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/547 |
| _version_ | 1817977958345736192 |
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| author | Jonas Oliveira da Silva Fernanda Beatrice Conceição Nonato Francisco Glaildo Almeida Sampaio Linda V. Ehlin Caldas |
| author_facet | Jonas Oliveira da Silva Fernanda Beatrice Conceição Nonato Francisco Glaildo Almeida Sampaio Linda V. Ehlin Caldas |
| author_sort | Jonas Oliveira da Silva |
| collection | DOAJ |
| description | 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, and the collecting electrode and the guard ring were painted with a homogeneous mixture of nail polish and graphite. The dedicated ionization chamber presented linearity of the response with the absorbed dose in the range of 0.5 Gy to 8.0 Gy, an increase of the response with the field size increasing, an angular dependence within ±5°, as recommended by international standards, and a polarity effect of 0.78% with the field size. From the results obtained, it is possible to conclude that the plane parallel ionization chamber tested in this work presents potential use for electron beam dosimetry in clinical routine.
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| first_indexed | 2024-04-13T22:23:08Z |
| format | Article |
| id | doaj.art-d039ec049cd14dbabd661f8258dc30de |
| institution | Directory Open Access Journal |
| issn | 2319-0612 |
| language | English |
| last_indexed | 2024-04-13T22:23:08Z |
| publishDate | 2018-09-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj.art-d039ec049cd14dbabd661f8258dc30de2022-12-22T02:27:08ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122018-09-016310.15392/bjrs.v6i3.547Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beamsJonas Oliveira da Silva0Fernanda Beatrice Conceição Nonato1Francisco Glaildo Almeida Sampaio2Linda V. Ehlin Caldas3Universidade Federal de GoiásCentro Universitário Anhanguera de Santo AndréInstituto de Radioterapia e MegavoltagemInstituto de Pesquisas Energéticas e Nucleares, IPEN - CNEN/SPIonization 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, and the collecting electrode and the guard ring were painted with a homogeneous mixture of nail polish and graphite. The dedicated ionization chamber presented linearity of the response with the absorbed dose in the range of 0.5 Gy to 8.0 Gy, an increase of the response with the field size increasing, an angular dependence within ±5°, as recommended by international standards, and a polarity effect of 0.78% with the field size. From the results obtained, it is possible to conclude that the plane parallel ionization chamber tested in this work presents potential use for electron beam dosimetry in clinical routine. https://bjrs.org.br/revista/index.php/REVISTA/article/view/547ionization chamberselectron beamsradiation dosimetryradiotherapy |
| spellingShingle | Jonas Oliveira da Silva Fernanda Beatrice Conceição Nonato Francisco Glaildo Almeida Sampaio Linda V. Ehlin Caldas Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams Brazilian Journal of Radiation Sciences ionization chambers electron beams radiation dosimetry radiotherapy |
| title | Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| title_full | Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| title_fullStr | Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| title_full_unstemmed | Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| title_short | Evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| title_sort | evaluation of some dosimetric properties of a dedicated plane parallel ionization chamber for radiotherapy electron beams |
| topic | ionization chambers electron beams radiation dosimetry radiotherapy |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/547 |
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