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Feasibility Study of the Neutron Dose for Real-time Image-guided Proton Therapy: A Monte Carlo Study

Authors
 Jin Sung Kim  ;  Jung Suk Shin  ;  Daehyun Kim  ;  Eunhyuk Shin  ;  Kwangzoo Chung  ;  Sungkoo Cho  ;  Sung Hwan Ahn  ;  Sanggyu Ju  ;  Yoonsun Chung  ;  Sang Hoon Jung  ;  Youngyih Han 
Citation
 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, Vol.67(1) : 142-146, 2015 
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
 0374-4884 
Issue Date
2015
Keywords
Proton therapy ; Monte-Carlo simulation ; Neutron dose
Abstract
Two full rotating gantries with different nozzles (multipurpose nozzle with MLC, scanning dedicated nozzle) for a conventional cyclotron system are installed and being commissioned for various proton treatment options at Samsung Medical Center in Korea. The purpose of this study is to use Monte Carlo simulation to investigate the neutron dose equivalent per therapeutic dose, H/D, for X-ray imaging equipment under various treatment conditions. At first, we investigated the H/D for various modifications of the beamline devices (scattering, scanning, multi-leaf collimator, aperture, compensator) at the isocenter and at 20, 40 and 60 cm distances from the isocenter, and we compared our results with those of other research groups. Next, we investigated the neutron dose at the X-ray equipment used for real-time imaging under various treatment conditions. Our investigation showed doses of 0.07 ~ 0.19 mSv/Gy at the X-ray imaging equipment, depending on the treatment option and interestingly, the 50% neutron dose reduction was observed due to multileaf collimator during proton scanning treatment with the multipurpose nozzle. In future studies, we plan to measure the neutron dose experimentally and to validate the simulation data for X-ray imaging equipment for use as an additional neutron dose reduction method.
Full Text
https://link.springer.com/article/10.3938/jkps.67.142
DOI
2015
Appears in Collections:
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
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/157352
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