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KMID : 0371619980140020327
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Journal of Wonkwang Medical Science
1998 Volume.14 No. 2 p.327 ~ p.332
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Measurement and Simulation of Dose Distributions Around an Ir-192 Seed
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Moon Sun-Rock
Jeong Dong-Hyeok
Lee Jeong-Ok
Kang Jeong-Ku
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Abstract
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Background : As a fundamental study, measurement and Monte Carlo simulations for an Ir-192 source were performed to apply to the clinical dose calculations, and compared the results with recommended values for the source.
Methods : The dose distribution as a function of radial distance from the axis of the source was measured using water phantoms and semiconductor detectors and calculated using Monte Carlo code with the input data prepared for the physical data for the source.
Results : The measured data were higher than the data recommended from Meisberger et al. for all distances with the maximum differences of 30%, while the calculated data were in good agreement within 6% with recommended data.
Conclusion : We found the Monte Carlo calculations for the adjacent area to the source are more suitable than measurement, because the measurement conditions were not satisfied in the region. As a result of this study, the application of Monte Carlo methods to the clinical dose calculation can be possible, but the calculated data should be evaluated accurately.
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KEYWORD
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Ir-192, Monte Carlo calculation, EGS4
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