高能电子束在横向磁场中的蒙特卡罗研究
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- 英文论文题名：Monte carlo study of high energy electron beam in transverse magnetic fields
- 论文作者：吴骏翔 ; 游士虎 ; 黄静 ; 吴章文 ; 侯氢 ; 勾成俊
- 英文论文作者：WU Jun-xiang ; You Shi-hu ; HUANG Jing ; WU Zhang-wen ; HOU Qing ; GOU Cheng-jun ; Key Laboratory of Radiation Physics and Technology ; Ministry of Education ; Institute of Nuclear Science and Technology ; Sichuan University
- 年：2015
- 作者机构：四川大学原子核科学技术研究所辐射物理及技术教育部重点实验室;
- 论文关键词：电子束 ; 蒙特卡罗 ; 横向磁场 ; 剂量分布 ; 穿透深度计算公式
- 英文论文关键词：electron beam ; Monte Carlo ; transverse magnetic fields ; penetration depth calculation formula
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第8册（同位素分卷、辐射研究与应用分卷、核技术工业应用分卷、核农学分卷、核医学分卷、核情报分卷）
- 语种：中文
- 分类号：R730.55
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：265k
- 原文格式：O
- 会议级别：全国
摘要
文本使用蒙特卡罗方法研究了能量分别为6、10、15 MeV的高能电子束在0、1.0、1.5 T横向磁场中的穿透深度和剂量分布,并提出了穿透深度的计算公式。模拟结果显示,在1.5 T的磁场中10 MeV电子束的射程与无磁场相比减少52%,峰值剂量与表面剂量的比值达到2.17,在射程的1.37 cm处形成了类似于重离子的伪布拉格峰,随后剂量快速的跌落。并利用上述计算公式得到电子束在磁场中的穿透深度,并与MC的模拟值相比较,其误差均小于0.5cm。研究结果表明,利用该计算公式可以快速准确得到高能电子束在横向磁场中的穿透深度;并证明横向磁场明显改变了电子束的剂量分布,但没有消除它在射程末端剂量快速跌落和峰值剂量与表面剂量比值高等治疗优势,为电子束的肿瘤治疗提供了一种具有很大潜力的治疗手段。
引文
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[4]Michael C L,Chang M M.Monte Carlo characterization of clinical electron beams in transverse magnetic fields[J].Phys Med Biol,2000,45(10):2947-2967.
[5]Bostick W H.Possible techniques in direct-electron beam tumour therapy[J].Phys Rev,1950,77(4):564-565.
[6]Weinhous M S,Nath R,Schulz R J.Enhancement of electron beam dose distributions by longitudin-al magnetic fields:Monte Carlo simulations and magnet system optimization[J].Med Phys,1985,12(5):598-603.
[7]Bielajew A F.The effect of strong longitudinal magnetic fields on dose deposition from electro deposition from electron and photon beams[J].Med Phys,1993,20(4):1171-1179.
[8]Nath R,Schulz R J.Modification of electron-beam dose distributions by transverse magnetic fields[J].Med Phys,1978,5(3):226-230.
[9]Nardi E,Barnea G.Electron beam therapy with transverse magnetic fields[J].Med Phys,1999,26(6):967-973.
[10]Shih C C.High energy electron radiotherapy in a magnetic field[J].Med Phys,1975,2(1):9-13.
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