Evaluation of the effect of mechanical deformation on beam isocenter properties of the SC200 scanning beam delivery system

doi:10.1016/j.net.2020.02.012

	Evaluation of the effect of mechanical deformation on beam isocenter properties of the SC200 scanning beam delivery system
	Wang, Ming 1,2; Zheng, Jinxing 1; Song, Yuntao 1,2; Li, Ming 1,2; Zeng, Xianhu 1,2
刊名	NUCLEAR ENGINEERING AND TECHNOLOGY
	2020-09-01
卷号	52
关键词	SC200 Proton therapy PBS nozzle Gantry Beam isocenter properties
ISSN号	1738-5733
DOI	10.1016/j.net.2020.02.012
通讯作者	Zheng, Jinxing(jxzheng@ipp.ac.cn)
英文摘要	For proton pencil beam scanning (PBS) technology, the accuracy of the dose distribution in a patient is sensitive to the properties of the incident beam. However, mechanical deformation of the proton therapy facility may occur, and this could be an important factor affecting the proton dose distribution in patients. In this paper, we investigated the effect of deformation on an SC200 proton facility's beam isocenter properties. First, mechanical deformation of the PBS nozzle, L-shape plate, and gantry were simulated using a Finite Element code, ANSYS. Then, the impact of the mechanical deformation on the beam's isocenter properties was evaluated using empirical formulas. In addition, we considered the simplest case that could affect the properties of the incident beam (i.e. if only the bending magnet (BG3) has an error in its mounting alignment), and the effect of the beam optics offset on the isocenter characteristics was evaluated. The results showed that the deformation of the beam position in the X and Y direction was less than 0.27 mm, which meets the structural design requirements. Compared to the mechanical deformation of the L-shape plate, the deformation of the gantry had more influence on the beam's isocenter properties. When the error in the mounting alignment of the BG3 is equal to or more than 0.3 mm, the beam deformation at the isocenter exceeds the maximum accepted deformation limits. Generally speaking, for the current design of the SC200 scanning beam delivery system, the effects of mechanical deformation meet the maximum accepted beam deformation limits. In order to further study the effect of the incident beam optics on the isocenter properties, a fine-scale Monte Carlo model including factors relating to the PBS nozzle and the BG3 should be developed in future research. (C) 2020 Korean Nuclear Society, Published by Elsevier Korea LLC.
资助项目	Important Science & Technology Specific Projects of Anhui[1703081003]
WOS关键词	PROTON THERAPY ; PHOTON ; DOSIMETRY
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	KOREAN NUCLEAR SOC
WOS记录号	WOS:000555789300006
资助机构	Important Science & Technology Specific Projects of Anhui
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/45004]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, Jinxing
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ming,Zheng, Jinxing,Song, Yuntao,et al. Evaluation of the effect of mechanical deformation on beam isocenter properties of the SC200 scanning beam delivery system[J]. NUCLEAR ENGINEERING AND TECHNOLOGY,2020,52.
APA	Wang, Ming,Zheng, Jinxing,Song, Yuntao,Li, Ming,&Zeng, Xianhu.(2020).Evaluation of the effect of mechanical deformation on beam isocenter properties of the SC200 scanning beam delivery system.NUCLEAR ENGINEERING AND TECHNOLOGY,52.
MLA	Wang, Ming,et al."Evaluation of the effect of mechanical deformation on beam isocenter properties of the SC200 scanning beam delivery system".NUCLEAR ENGINEERING AND TECHNOLOGY 52(2020).