- Introduce
- Editorial Board
- Journal
- Special Source
- Excellent Articles
- Authors
- Reviewers
- Publication Statement
- 个人中心
- 退出登录
浏览全部资源
扫码关注微信
- Introduce
- Editorial Board
- Journal
- Special Source
- Excellent Articles
- Authors
- Reviewers
- Publication Statement
Optimalizing electron beam parameters of linear accelerator based on Monte Carlo simulation
- NUCLEAR TECHNIQUES Vol. 41, Issue 6, Article number: 060201(2018)
- 作者机构：
1.南华大学附属第一医院 放疗科 衡阳 421001
2.南华大学 核科学技术学院 衡阳 421001
- 作者简介：
- 基金信息：Key Research and Development Program of Hunan Province;Hunan Natural Science Youth Foundation
DOI：10.11889/j.0253-3219.2018.hjs.41.060201
CLC： TL53Received：05 February 2018，
Revised：13 March 2018，
Published：10 June 2018
- 稿件说明：
移动端阅览
Fan ZHANG, Ainong XIAO, Haibiao WU, et al. Optimalizing electron beam parameters of linear accelerator based on Monte Carlo simulation[J]. Nuclear techniques, 2018, 41(6): 060201
Fan ZHANG, Ainong XIAO, Haibiao WU, et al. Optimalizing electron beam parameters of linear accelerator based on Monte Carlo simulation[J]. Nuclear techniques, 2018, 41(6): 060201 DOI： 10.11889/j.0253-3219.2018.hjs.41.060201.
摘要
通过蒙特卡罗方法模拟瓦里安IX加速器6 MV能量档、10 cm×10 cm射野下的剂量分布，研究电子线参数对剂量分布的影响，并寻找确定最优电子线参数的简化方法。结果表明：当电子线平均能量和径向强度分布分别在5.5~6.4 MeV及0.1~0.4 cm变化时，百分深度剂量没有显著变化；当径向强度分布在0~0.19 cm变化时，主剂量区内模拟与测量的离轴剂量差异很小，但在半影区，二者之间有较大差异；通过调整平均角展宽，可以使不同深度处模拟与测量的离轴剂量有更好的符合度。根据本文提出的电子线参数确定方法可以使模拟的剂量更为精确，由于百分深度剂量与离轴剂量分别对径向强度分布及平均能量不敏感，各参数可以独立地根据单一剂量分布确定。
Abstract
Background
2
With the development of radiation technology
it needs to improve the accuracy of dose simulation.
Purpose
2
Build up a simplified benchmarking procedure to determine the incident electron beam parameters independently using a Monte Carlo linear accelerator model.
Methods
2
A 10 cm×10 cm field is simulated to acquire the parameters influence on the dose distributions for Varian Ⅸ 6 MV megavoltage electron beams.
Results
2
The calculated depth doses had no significant changes when the electron mean energy and radial intensity varied in 5.5~6.4 MeV and 0.1~0.4 cm respectively. And the dose profile simulated with an electron radial intensity in 0~0.19 cm had a good agreement with the measured dose profile in the main field while obvious discrepancies in the penumbra region. The mean angular spread was found to be 0.3° to get good matching between calculations and measurements at all considered depths.
Conclusion
2
Accurate dose distributions are achieved by using the incident electron beam parameters benchmarked with the proposed procedure. As the percentage depth doses and dose profiles are insensitive to the electron energy and radial intensity correspondingly
they are feasible to benchmark individually.
关键词
Keywords
references
D W O Rogers , A F Bielajew . Monte Carlo techniques of electron and photon transport for radiation dosimetry . Dosimetry of Ionizing Radiation , 1990 . 3 ( 1 ): 427 - 539 . http://radiationdosimetry.org/files/documents/0000015/68-ncs-rapport-16-monte-carlo-treatment-planning.pdf .
P Andreo . Monte Carlo techniques in medical radiation physics . Physics in Medicine and Biology , 1991 . 36 ( 7 ): 861 - 920 . DOI: 10.1088/0031-9155/36/7/001 http://doi.org/10.1088/0031-9155/36/7/001 .
J J Demarco , T Solberg , J B Smathers . A CT-based Monte Carlo simulation tool for dosimetry planning and analysis . Medical Physics , 1998 . 25 ( 1 ): 1 - 11 . DOI: 10.1118/1.598167 http://doi.org/10.1118/1.598167 .
I J Chetty , B Curran , J E Cygler , . Report of the AAPM task group No.105:issues associated with clinical implementation of Monte Carlo-based photon and electron external beam treatment planning . Medical Physics , 2007 . 34 ( 12 ): 4818 - 1853 . DOI: 10.1118/1.2795842 http://doi.org/10.1118/1.2795842 .
D Sheikh-Bagheri , D W O Rogers . Sensitivity of megavoltage photon beam Monte Carlo simulations to electron beam and other parameters . Medical Physics , 2002 . 29 ( 3 ): 379 - 390 . DOI: 10.1118/1.1446109 http://doi.org/10.1118/1.1446109 .
J Pena , D M Gonzalez-Castano , F Gomez . Automatic determination of primary electron beam parameters in Monte Carlo simulation . Medical Physics , 2007 . 34 ( 3 ): 1076 - 1084 . DOI: 10.1118/1.2514155 http://doi.org/10.1118/1.2514155 .
L L W Wang , K Leszczynski . Estimation of the focal spot size and shape for a medical linear accelerator by Monte Carlo simulation . Medical Physics , 2007 . 34 ( 2 ): 485 - 488 . DOI: 10.1118/1.2426407 http://doi.org/10.1118/1.2426407 .
E Sham , J Seuntjens , S Devic , . Influence of focal spot on characteristics of very small diameter radiosurgical beams . Medical Physics , 2008 . 35 ( 7 ): 3317 - 3330 . DOI: 10.1118/1.2936335 http://doi.org/10.1118/1.2936335 .
韩 俊杰 , 朱 金汉 , 张 白霖 , . 医用直线加速器主要部件对X射线能谱的影响 . 核技术 , 2015 . 38 ( 10 ): 100202 DOI: 10.11889/j.0253-3219.2015.hjs.38.100202 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.100202 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract491.shtml .
Junjie HAN , Jinhan ZHU , Bailin ZHANG , . Effects of main components of clinical linac on X-ray energy spectra . Nuclear Techniques , 2015 . 38 ( 10 ): 100202 DOI: 10.11889/j.0253-3219.2015.hjs.38.100202 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.100202 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract491.shtml .
I Kawrakow . Accurate condensed history Monte Carlo simulation of electron transport Ⅰ:EGSnrc, the new EGS4 version . Medical Physics , 2000 . 27 ( 3 ): 485 - 498 . DOI: 10.1118/1.598917 http://doi.org/10.1118/1.598917 .
D W O Rogers , B R B Walters , I Kawrakow . Beamnrc users manual , : Ottawa National Research Council Canada , 2009 . 18 - 114 .
B R B Walters , I Kawrakow , D W O Rogers . Dosxyznrc users manual , : Ottawa National Research Council Canada , 2009 . 10 - 70 .
熊 绮丽 , 石 勇 , 徐 刚 , . TrueBeam加速器多叶准直器射野剂量学特性 . 核技术 , 2015 . 38 ( 10 ): 100203 DOI: 10.11889/j.0253-3219.2015.hjs.38.100203 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.100203 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract493.shtml .
Qili XIONG , Yong SHI , Gang XU , . Dosimetry characteristics of muti-leaf collimator field for TrueBeam . Nuclear Techniques , 2015 . 38 ( 10 ): 100203 DOI: 10.11889/j.0253-3219.2015.hjs.38.100203 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.100203 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract493.shtml .
I Kawrakow , D W O Rogers , B R Walters . Large efficiency improvements in BEAMnrc using directional bremsstrahlung splitting . Medical Physics , 2004 . 31 ( 10 ): 2883 - 2898 . DOI: 10.1118/1.1788912 http://doi.org/10.1118/1.1788912 .
Y Cao , X Y Yang , Z Yang , . Superficial dose evaluation of four dose calculation algorithms . Radiation Physics and Chemistry , 2016 . 2 ( 1 ): 1 - 6 . DOI: 10.1016/j.radphyschem.2016.02.032 http://doi.org/10.1016/j.radphyschem.2016.02.032 .
A Tzedakis , J E Damilakis , M Mazonakis , . Influence of initial electron beam parameters on Monte Carlo calculated absorbed dose distributions for radiotherapy photon beams . Medical Physics , 2004 . 31 ( 4 ): 907 - 913 . DOI: 10.1118/1.1668551 http://doi.org/10.1118/1.1668551 .
O Chibani , B Moftah , C M C Ma . On Monte Carlo modeling of megavoltage photon beams:a revisited study on the sensitivity of beam parameters . Medical Physics , 2011 . 38 ( 1 ): 188 - 201 . DOI: 10.1118/1.3523625 http://doi.org/10.1118/1.3523625 .
S S Almberg , J Frengen , A Kylling , . Monte Carlo linear accelerator simulation of megavoltage photon beams:independent determination of initial beam parameters . Medical Physics , 2012 . 39 ( 1 ): 40 - 47 . DOI: 10.1118/1.3668315 http://doi.org/10.1118/1.3668315 .
0
Views
26
下载量
1
CSCD
- L-PDFDownload
- Meta-XMLDownload
- BibTeXDownload
- EndnoteDownload
- RefMan Download
- NoteExpressDownload
- NoteFirstDownload
Publicity Resources
Related Articles
Related Author
Related Institution
AI问答- Address：2019 Jialuo Road, Jiading, Shanghai, China Postal code：201800
- Tel：021-39194977 Email：LHB@sinap.ac.cn
- Technical support is provided by Beijing Founder electronics co., LTD 沪ICP备05005479号-1
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
- Total Visits：880473
