Analysis of the calibration results of ionization chambers for orthovoltage and brachytherapy

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Analysis of the calibration results of ionization chambers for orthovoltage and brachytherapy

An analysis of the exposure calibration coefficients for ionization chambers used for dose determination in orthovoltage radiotherapy and in brachytherapy in the Polish SSDL was performed. The coefficients were determined by calibrating the chambers in the X-ray beam of 235 kV or 290 kV and HVL of 2.5 mmCu or 4 mmCu respectively, and also in the Co-60 gamma beam. Calibration procedures followed IAEA recommendations in Report No. TECDOC 1274 and Technical Reports Series No. 277. The characteristics of the energy dependence of various types of chambers used in orthovoltage radiotherapy and in brachytherapy are presented. On the basis of the summarized data and on the energy dependence curves it was possible to conclude that: 1) in he case of calibration of the chambers for orthovoltage radiotherapy the energy dependence has to be established for the full range beam qualities; 2) in the case of calibration, of the investigated chambers, for brahytherapy with Cs-137 and Ir-192 sources, establishing of the exposure calibration factor for Co-60 is sufficient.

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  • Rozporzadzenie Ministra Zdrowia z 25.08.05. w sprawie bezpiecznego stosowania promieniowania jonizujacego dla wszystkich rodzajow ekspozycji medycznej. Dziennik Ustaw Nr 194 poz. 1624 1625. [Regulation of the Minister of Health of 25.08.05 on the safety of ionizing radiation use in all type of medical exposure]. Polish

  • Andreo P Seuntjens JP Podgorsak EB. Calibration of photon and electron beams. In: Podgorsak EB ed. Radiation Oncology Physics. Vienna: IAEA 2005. pp. 301-354.

  • Bulski W Gwiazdowska B Pruszynski A Rostkowska J. Infrastructure of radiotherapy In Poland. Infrastruktura radioterapii w Polsce. Nowotwory 2007 57 (5): 487-517.

  • Olszewska A Bulski W Kawczynska M. Calibration of high dose rate Ir-192 sources for brachytherapy. Pol J Med Phys Eng. 1998; 4 (1): 1-12.

  • Goetsch SJ Attix FH Pearson DW Thomadsen BR. Calibration of Ir-192 high-dose-rate afterloading systems. Med Phys. 1991; 18(3): 462-467.

  • Mainegra-Hing E Rogers DWO. On the accuracy of the techniques for obtaining the calibration coefficient NK of Ir-192 HDR brachytherapy sources. Mrd Phys. 2006; 33(9): 3340-3347.

  • Join Working Party of the British Institute of Radiologyand the Hospital Physicits' Association. Central Axis Depth Dose Data for Use in Radiotherapy. Br J Radiol. 1983 Supplement No. 17.

  • Publication Committee of the British Journal of Radiolgy. Cohen M Jones D C A Green D (ed.). Central Axis Depth Dose Data for Use in Radiotherapy. Br J Radiol. 1972 Supplement No. 11.

  • IAEA. Calibration of photon and beta ray sources used in brachytherapy. IAEA Report Vienna 2002; No. TECDOC-1274. (

  • Instrukcja Nr 22 Prezesa Polskiego Komitetu Normalizacji i Miar z dnia 24 wrzesnia 1977 r. o sprawdzaniu uzytkowych dawkomierzy terapeutycznych promieniowania X i gamma. Dziennik Normalizacji i Miar Nr 26 poz. 84 z dnia 22.10.1977. [Instruction No. 22 of the President of the Polish Committee of Normalization and Measures of 24.09.1977 on legalization of dosimeters used in radiotherapy with X and gamma rays]. Polish

  • IAEA. Absorbed dose determination in photon and electron beams. An international code of practice. Technical Reports Series second edition Vienna 1997; No. TRS 277.

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