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6MeV医用电子直线加速器中束斑尺寸的计算与测量
Beam spot size calculation and measurement of 6-MeV medical linear accelerator
- 核技术 2016年39卷第6期 文章编号：060203
- 作者机构：
上海联影医疗科技有限公司 上海 201807
- 作者简介：
[ "廖浪, 男, 1988年出生, 2015年于中国科学院上海应用物理研究所获博士学位, 研究方向为加速器物理", "LIAO Lang, male, born in 1988, graduated from Shanghai Institute of Applied Physics, Chinese Academy of Sciences with a doctor’s degree in 2015, focusing on accelerator physics" ]
宋瑞英, E-mail: ruiying.song@united-imaging.com SONG Ruiying, E-mail: ruiying.song@united-imaging.com
- 基金信息：上海张江国家自主创新示范区专项发展资金重点项目(No.201505-JD-B108-010)资助()
DOI：10.11889/j.0253-3219.2016.hjs.39.060203
中图分类号： TL53收稿日期：2016-04-14，
修回日期：2016-05-04，
纸质出版日期：2016-06
- 稿件说明：
移动端阅览
廖浪, 宋瑞英, 程鹏. 6MeV医用电子直线加速器中束斑尺寸的计算与测量[J]. 核技术, 2016,39(6):060203
Lang LIAO, Ruiying SONG, Peng CHENG. Beam spot size calculation and measurement of 6-MeV medical linear accelerator[J]. Nuclear techniques, 2016, 39(6): 060203
廖浪, 宋瑞英, 程鹏. 6MeV医用电子直线加速器中束斑尺寸的计算与测量[J]. 核技术, 2016,39(6):060203 DOI： 10.11889/j.0253-3219.2016.hjs.39.060203.
Lang LIAO, Ruiying SONG, Peng CHENG. Beam spot size calculation and measurement of 6-MeV medical linear accelerator[J]. Nuclear techniques, 2016, 39(6): 060203 DOI： 10.11889/j.0253-3219.2016.hjs.39.060203.
摘要
区别于大型加速器上对于束斑的定义与计算
医用电子直线加速器的束斑会影响剂量的X辐射分布(Profile)的半影区
从而影响放疗设备的治疗精度
对它的研究侧重点也不同于其它类型的加速器。基于这个原因
针对目前医用电子直线加速器尤其是国内医用电子直线加速器对电子束束斑计算与测量数据不够的问题
从束斑的理论计算出发
归纳了两种方法
并进行了对比研究。在理论研究的基础上
对上海联影医疗有限公司的6MeV医用电子直线加速器的束斑进行了实验测量
采用两种高斯分布叠加拟合实验数据以得到较好的精度
对实验中的系统误差进行了分析
与理论计算较为吻合。
Abstract
Background
2
The spot size is of interest to the beam quality for the accelerator facility. As compared with the large accelerator scientific facility
the method to calculate the spot size is found to be different in the medical linear accelerator. The spot size in medical linear accelerator determines the penumbra field of the dose
which is important for the effective operation of medical linear accelerator.
Purpose
2
This paper aims to summarize the calculation methods of spot size
hence the discrepancy between both methods is investigated here to give a better understanding of the beam spot size.
Methods
2
The experiment setup based on the optical detection technique was presented here to given rise to the spot size results of medical linear accelerator in Shanghai United Imaging Healthcare Co.
Ltd. (UIH)
and a combined non-Gaussian method was proposed here to give a suitable fitting for the experiment results.
Results
2
The spot full width at half maximum (FWHM) of the 6-MeV medical linear accelerator was about 1.81 mm and 1.84 mm in
x
and
y
direction respectively
which is close to the results of calculation.
Conclusion
2
The definition of the spot size proposed here is useful for the optimizing of accelerator design
as well as the penumbra field of dose.
关键词
Keywords
references
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