The Theoretical Study of Absorbed Dose Distributions in Water Phantom Irradiated by High Energy Photon Beam

물팬톰에 조사된 고에너지 광자선의 선량 분포 특성에 관한 이론적 고찰

We have claculated the absorbed dose distributions in water phantom irradiated by high energy photon beam. PDD (Percent Depth Dose) and Beam Profile can be represented by functions of depths and distances by using one dimensional model model based on transport theory. The parameters on scattering and absorption are evaluated by using non-linear regression process method. The values neeessary for calculation are obtained by simple experiment. The calculated values are in good agreement with the measured values.