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http://dx.doi.org/10.14316/pmp.2014.25.3.123

Determination of TRS-398 Quality Factors for Cs-137 Gamma Rays in Reference Dosimetry  

Kang, Sang Koo (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Rhee, Dong Joo (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Kang, Yeong Rok (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Kim, Jeung Kee (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Jeong, Dong Hyeok (Research Center, Dongnam Inst. of Radiological & Medical Sciences)
Publication Information
Progress in Medical Physics / v.25, no.3, 2014 , pp. 123-127 More about this Journal
Abstract
The Cs-137 irradiator is widely used to irradiate biological samples for radiobiological research. To obtain the accurate outcomes, correct measurements of the delivered absorbed dose to a sample is important. The IAEA protocols such as TRS-277 and TRS-398 were recommended for the Cs-137 reference dosimetry. However in TRS-398 protocol, currently known as the most practical dosimetry protocol, the quality factor ($k_{Q,Q_0}$) for Cs-137 gamma rays is not suggested. Therefore, the use of TRS-398 protocol is currently unavailable for the Cs-137 dosimetry directly. The calculation method previously introduced for high energy photon beams in radiotherapy was used for deriving the Cs-137 beam qualities ($k_{Q,Q_0}$) for the 15 commercially available farmer type ionization chambers in this study. In conclusion, $k_{Q,Q_0}$ values were ranged from 0.998 to 1.002 for Cs-137 gamma rays. These results can be used as the reference and dosimeter calibrations for Cs-137 gamma rays in the future radiobiological researches.
Keywords
Cs-137 gamma rays; TRS-398 protocol; Quality factor;
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Times Cited By KSCI : 1  (Citation Analysis)
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