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Monte Carlo simulation of secondary neutron dose for scanning proton therapy using FLUKA.

 Chaeyeong Lee  ;  Sangmin Lee  ;  Seung-Jae Lee  ;  Hankyeol Song  ;  Dae-Hyun Kim  ;  Sungkoo Cho  ;  Kwanghyun Jo  ;  Youngyih Han  ;  Yong Hyun Chung  ;  Jin Sung Kim 
 PLOS ONE, Vol.12(10) : e0186544, 2017 
Journal Title
Issue Date
Computer Simulation* ; Dose-Response Relationship, Radiation ; Monte Carlo Method* ; Neutrons* ; Proton Therapy* ; Protons ; Radiotherapy Dosage* ; Reproducibility of Results
Proton therapy is a rapidly progressing field for cancer treatment. Globally, many proton therapy facilities are being commissioned or under construction. Secondary neutrons are an important issue during the commissioning process of a proton therapy facility. The purpose of this study is to model and validate scanning nozzles of proton therapy at Samsung Medical Center (SMC) by Monte Carlo simulation for beam commissioning. After the commissioning, a secondary neutron ambient dose from proton scanning nozzle (Gantry 1) was simulated and measured. This simulation was performed to evaluate beam properties such as percent depth dose curve, Bragg peak, and distal fall-off, so that they could be verified with measured data. Using the validated beam nozzle, the secondary neutron ambient dose was simulated and then compared with the measured ambient dose from Gantry 1. We calculated secondary neutron dose at several different points. We demonstrated the validity modeling a proton scanning nozzle system to evaluate various parameters using FLUKA. The measured secondary neutron ambient dose showed a similar tendency with the simulation result. This work will increase the knowledge necessary for the development of radiation safety technology in medical particle accelerators.
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1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jinsung(김진성) ORCID logo https://orcid.org/0000-0003-1415-6471
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