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The aim of this work is to characterize the ferrous sulfate-benzoic acid-xylenol orange (FBX) aqueous chemical dosimeter developed at our laboratory, prepared using ultra pure water, by measuring the absorption spectrum, dose response curve, precision and accuracy, energy and dose rate dependency and stability of response. The FBX readings were evaluated by using an accurate spectrophotometer. Experimental data were obtained using various nominal energies 6 MV, 18 MV, 12 MeV, and 15 MeV, including the 60Co γ-rays beam. The calibration of the dosimeters was performed using the ionization chamber as a reference dosimeter. The results show that the FBX dosimeter has a good precision of about 0.2%, no significant energy, dose rate dependence and a linear dose-response relationship in the 1-5 Gy range.
Rocznik
Tom
Strony
55--59
Opis fizyczny
Bibliogr. 16 poz., rys., tab.
Twórcy
autor
- Department of medical physics, Nuclear Research Center of Algiers (NRCA), 02 Boulevard Frantz Fanon B.P. 399 Alger-Gare, Algeria
autor
- Department of medical physics, Nuclear Research Center of Algiers (NRCA), 02 Boulevard Frantz Fanon B.P. 399 Alger-Gare, Algeria
autor
- Centre Anti Cancèreux, Blida, Algeria
Bibliografia
- [1] Gupta BL. Low-level dosimetric studies with the FeSO4–benzoic acid–xylenol orange system. In: Dosimetry in agriculture, industry, biology and medicine. Proceedings of a symposium organized by the IAEA [International Atomic Energy Agency] 17021 April 1972; Vienna, Austria. Vienna: IAEA; 1973: 4210432.
- [2] Gupta BL, Gomathy KR. Consistency of ferrous sulfate-benzoic acid-xylenol orange dosimeter. Int J Appl Radiat Isot. 1974;25(11-12):509-513.
- [3] Gupta BL, Bhat RM, Gomathy KR Suseela B. Radiation chemistry of the ferrous sulphate-benzoic acid-xylenol orange dosimeter. Radiat Res. 1978;75(2):269-277.
- [4] Gupta BL, Kini UR, Bhat RM, Madhvanath U. Use of the FBX dosimeter for the calibration of cobalt-60 and high energy teletherapy machines. Phys Med Biol. 1982;27(2):235-245.
- [5] Gupta BL, Narayan GR, Bhat RM, Kini UR, et al. Use of the FBX dosimeter for the quality assurance of 60Co and high-energy teletherapy machines by mail. Phys Med Biol. 1992;37(11):2095-2102.
- [6] Madhvanath U, Kini UR, Gupta BL. Calibration of brachytherapy sources using ferrous sulfate-benzoic acid-xylenol orange dosimeter. Int J Appl Radiat Isot. 1976;27(8):443-446.
- [7] Semwal MK, Bansal AK, Thakur PK, Vidyasagar PB. In-vivo (entrance) dose measurements in external beam radiotherapy with aqueous FBX dosimetry system. J Med Phys. 2005;30(1):32-35.
- [8] Semwal MK, Bansal AK, Thakur PK, Vidyasagar PB. FBX aqueous chemical dosimeter for measurement of virtual wedge profiles. J Appl Clin Med Phys. 2008;9(2):206-210.
- [9] IAEA. Absorbed dose determination in external beam radiotherapy: an international code of practice for dosimetry based on standards of absorbed dose to water. Vienna: International Atomic Energy Agency, Technical Reports Series TRS-398; 2000.
- [10] ISO. Guide to the Expression of Uncertainty in Measurement: International Organization for Standardization, ISO 1993.
- [11] Bhat AA, Choudhary D, Sarma A, et al. Response of an FBX dosimeter to high LET 7Li and 12C ions. Radiat Phys Chem. 2003;68(5):909-916.
- [12] Gupta BL, Nilekani SR. Ferrous ion oxidation by H, OH and H2O2 in aerated FBX dosimetry system. Radiat. Phys. Chem. 1998;53(6):643-650.
- [13] Smith CW. Orthovoltage x-ray beams (0.5 mm-4.0 mm Cu HVL). Br J Radiol Suppl. 1996;25:24-38.
- [14] Jordan TJ. Megavoltage x-ray beams: 2-50 MV. Br J Radiol Suppl. 1996;25:62-109.
- [15] Brindha S, Rose JV, Sathyan S, et al. Modified ferrous ammonium sulfate benzoic acid xyelenol orange (MFBX) and thermoluminescent dosimeters – a comparative study. Phys Med Biol. 2002;47(11):N153-N158.
- [16] Klassen NV, Shortt KR, Seuntjens J, Ross CK. Fricke dosimetry: the difference between G(Fe3+) for 60Co-rays and high-energy x-rays. Phys Med Biol. 1999 44(7): 1609-1624.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-94c10f92-ec99-4cc2-b39d-6b9180c176a1
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