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Absorbed Dose Determination for a Biological Sample Irradiated by Gamma Rays from a Cs-137 Source  

Jeong, Dong-Hyeok (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Kim, Jeung-Kee (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Yang, Kwang-Mo (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Ju, Min-Su (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Kim, Min-Young (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Lee, Chang-Yeol (Department of Radiation Oncology, Dongnam Inst. of Radiological & Medical Sciences)
Kim, Jin-Ho (Department of Radiation Oncology, Dongnam Inst. of Radiological & Medical Sciences)
Publication Information
Progress in Medical Physics / v.22, no.3, 2011 , pp. 124-130 More about this Journal
Abstract
In this study the dosimetric evaluation for a biological sample irradiated by gamma rays from Cs-137 irradiator (Gamma Irradiator, Chiyoda Technol Co., Japan) was performed for radiobiological experiment. A spherical water with a diameter of 3 cm was assumed as a biological sample. The absorbed dose were determined by the air kerma based dosimetric calculation system. The theoretical and Monte Carlo calculations (MCNPX) were performed and compared to evaluate measured air kerma and determined absorbed dose respectively. As a result of comparison with theoretical calculation, the measured air kerma was in good agreement within 3.1% at the distance of 100 and 200 cm from the source. In comparison with Monte Carlo results the determined absorbed dose along the central axis was in good agreement within 1.9% and 3.7% at 100 cm and 200 cm respectively. Although the preliminary results were obtained in this study these results were used as a basis of dosimetric evaluation for radiobiological experiment. Extended study will be performed to evaluate the dose in various conditions of biological samples.
Keywords
Gamma Irradiator; Dosimetry; Monte Carlo Calculation;
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  • Reference
1 Yuko H, Tkaharu N, Takeshi O, et al: Application of a Newly Developed Photoluminescence GlassDosimeter for Measuring the Absorbed Dose in Individual Mice Exposed to Lowdose Rate Cs-137 $\gamma$-rays. J Radiat Res 129-137 (2000)
2 Khan FM: The Physics of Radiation Therapy. 3rd ed. Williams & Wilkins, Philadelphia, Lippincott (2003), pp. 140-141
3 Borg J, Kawrakow I, Rogers DWO, Seuntjens JP: Monte Carlo study of correction factors for Spencer-Attix cavity theory at photon energies at or above 100 keV. Med Phys 27:1804- 1813 (2000)   DOI   ScienceOn
4 AAPM TG-21: A protocol for the determination of absorbed dose from high-energy photon and electron beams. Med Phys 10:741-771 (1983)   DOI   ScienceOn
5 Cunningham JR, Sontag MR: Displacement corrections used in absorbed dose determination. Med Phys 7:672-676 (1980)   DOI   ScienceOn
6 Los Alamos National Laboratory: MCNPX (Monte Carlo N-Particle Code System) user's Manual V2.4.0, LANL (2002)
7 Johns HE, Cunningham JR: The Physics of Radiology. 4th ed. Springfield, US (1983), pp. 239-240
8 서울방사선서비스(주): 동물조사장치설치보고서. Report No. E-RD-D02-2010-0010 (2010)
9 Attix FH: Introduction to Radiological Physics and Radiation Dosimetry. John Wiley & Sons, USA (1986) pp. 304-331