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Study of Radiation dose Evaluation using Monte Carlo Simulation while Treating Extrahepatic Bile Duct Cancer with High Dose Rate Intraluminal Brachytherapy

간외 담도암 고선량률 관내근접방사선치료 시 몬테카를로 시뮬레이션을 통한 주변장기의 선량평가 연구

  • Received : 2013.12.20
  • Accepted : 2014.01.22
  • Published : 2014.02.28

Abstract

The relative dose calculated by MCNPX and the relative dose measured by ionization chamber and solid phantoms evaluated the accuracy comparing with Monte Carlo simulation. In order to apply Monte Carlo simulation the intraluminal brachytherapy of extrahepatic bile duct cancer, 192Ir sealed radioactive source replicate, Bile duct and surrounding organs were made using KMIRD phantom based on a South Korea standard man. To check the absorbed dose of normal organs around bile duct, we set the specific effective energy and initial radioactivity to 1 Ci using MCNPX. Evaluation of the accuracy of the Monte Carlo simulation, the difference of the relative dose is the most 1.96% that satisfy the criteria that is the relative error less than 2% suggested by MCNPX code. In addition, The specific effective energy and absorbed dose of normal organs that were relatively adjacent to bile duct such as right side of kidney, liver, pancreas, transverse colon, spinal cord, stomach and small intestine were relatively high. on the contrary, the organs that were relatively distant to bile duct such as left side of kidney, spleen, ascending colon, descending colon and sigmoid colon were relatively low.

Keywords

MCNPX;Intraluminal Brachytherapy;KMIRD Phantom;Specific Effective Energy;Absorbed Dose

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