Performance tests of a special ionization chamber for X-rays in mammography energy range
DOI:
https://doi.org/10.15392/bjrs.v6i2A.501Keywords:
ionization chamber, mammography, dosimetryAbstract
A special mammography homemade ionization chamber was developed to be applied for mammography energy range dosimetry. This chamber has a total sensitive volume of 6 cm³ and is made of a PMMA body and graphite coated collecting electrode. Performance tests as saturation, ion collection efficiency, linearity of chamber response versus air kerma rate and energy dependence were determined. The results obtained with this special homemade ionization chamber are within the limits stated in international recommendations. This chamber can be used in quality control programs of mammography energy range. All measurements were carried out at the Calibration Laboratory of IPEN.
Downloads
References
IAEA - International Atomic Energy Agency. Absorbed dose determination in external beam radiotherapy: An international code of practice for dosimetry based on standards of absorbed dose to water. IAEA TRS 398, Vienna: IAEA, 2000.
IAEA - International Atomic Energy Agency. Dosimetry in diagnostic radiology: An international code of practice. IAEA TRS 457, Vienna: IAEA, 2007.
IAEA - International Atomic Energy Agency. Quality assurance programme for digital mammography. IAEA HHS 17, Vienna: IAEA, 2011.
ICRP - International Commission on Radiological Protection. Managing patient dose in digital radiology. ICRP 93, Ottawa: ICRP, 2004.
IEC - International Electrotechnical Commission. Medical electrical equipment—dosimeters with ionization chambers and/or semi-conductor detectors as used in X-ray diagnostic imaging. IEC 61674, Geneva: IEC, 1997.
IEC - International Electrotechnical Commission. Medical electrical equipment—Dosimeters with ionization chambers as used in radiotherapy. IEC 60731, Geneva: IEC, 2011.
MEGHZIFENE, A.; DANCE, D. R.; McLEAN, D.; KRAMER, H.-M. Dosimetry in diagnostic radiology. Eur. J. Radiol., v. 76, n.1, p. 11-14, 2010. DOI: https://doi.org/10.1016/j.ejrad.2010.06.032
NONATO, F. B. C.; SAKURABA, R. K.; CRUZ, J. C.; CALDAS, L. V. E. Characterization tests of a new parallel plate ionization chamber for use in electron beams. Rad. Phys. Chem., v. 104, p. 244-247, 2014. DOI: https://doi.org/10.1016/j.radphyschem.2014.06.011
PERINI, A. P.; NEVES, L. P.; VIVOLO, V.; XAVIER, M.; KHOURY, H. J.; CALDAS, L. V. E. Characterization of a CT ionization chamber for radiation field mapping. Appl. Radiat. Isot., v. 70, n. 7, p. 1300-1303, 2012. DOI: https://doi.org/10.1016/j.apradiso.2011.11.051
PTB - Physikalisch-Technische Bundesanstalt. Radiation qualities used for studies in radiation protection. Available at: . Last accessed: 31 Jan. 2018.
SHAFIRI, B.; ZEINALI, H. Z.; SOLTANI, J.; NEGARESTANI, A.; SHAHVAR, A. Investigation and performance tests of a new parallel plate ionization chamber with double sensitive volume for measuring diagnostic X-rays. Nucl. Inst. Meth. A, v. 770, p. 177-181, 2015. DOI: https://doi.org/10.1016/j.nima.2014.09.083
SILVA, J. O.; CALDAS, L. V. E. A double faced ionization chamber for quality control in diagnostic radiology beams. Appl. Radiat. Isot., v. 70, p. 1424-1428, 2012. DOI: https://doi.org/10.1016/j.apradiso.2011.11.052
YOSHIZUMI M. T.; CALDAS, L. V. E. Design and assembly of a simple monitor ionization chamber, In: Third European International Radiation Protection Association Congress, 2010, Helsinki. Proceedings. p. 14-16.
ZHU, T. C. Small Field: dosimetry in electron disequilibrium region. J. of Phys. Conf. Ser. v. 250, p. 1-10, 2010. DOI: https://doi.org/10.1088/1742-6596/250/1/012056
Downloads
Published
Issue
Section
Categories
License
Copyright (c) 2021 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
How to Cite
