瓦里安扩充型动态楔形板的蒙特卡罗模拟与验证

戴振晖; 招什武; 杨耕; 朱琳; 张白霖; 朱远湖; 靳怀志; 王学涛; 张煜

doi:10.11889/j.0253-3219.2017.hjs.40.120302

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瓦里安扩充型动态楔形板的蒙特卡罗模拟与验证

核化学、放射化学、放射性药物和核医学 | 更新时间：2021-05-19

- 瓦里安扩充型动态楔形板的蒙特卡罗模拟与验证
- Monte Carlo simulation and validation of the enhanced dynamic wedge of Varian accelerator
- 核技术 2017年40卷第12期文章编号：120302
- 作者机构：
  
  1.广东省中医院广州 510006
  2.南方医科大学广州 510515
- 作者简介：
  
  [ "戴振晖, 男, 1984年出生, 2010年于南方医科大学获硕士学位, 物理师, 工程师, 生物医学工程专业", "DAI Zhenhui, male, born in 1984, graduated from Southern Medical University with a master's degree in 2010, physicist, engineer, major in biomedical engineering" ]
  王学涛, E-mail:wangxuetao0625@126.com WANG Xuetao, E-mail:wangxuetao0625@126.com
- 基金信息：
  
  国家自然科学基金(61671230)
- DOI：10.11889/j.0253-3219.2017.hjs.40.120302
  中图分类号： TL72
- 收稿日期：2017-06-29，
  
  修回日期：2017-08-23，
  
  纸质出版日期：2017-12-10
- 稿件说明：
移动端阅览
戴振晖, 招什武, 杨耕, 等. 瓦里安扩充型动态楔形板的蒙特卡罗模拟与验证[J]. 核技术, 2017,40(12):120302

Zhenhui DAI, Shiwu ZHAO, Geng YANG, et al. Monte Carlo simulation and validation of the enhanced dynamic wedge of Varian accelerator[J]. Nuclear techniques, 2017, 40(12): 120302
戴振晖, 招什武, 杨耕, 等. 瓦里安扩充型动态楔形板的蒙特卡罗模拟与验证[J]. 核技术, 2017,40(12):120302 DOI： 10.11889/j.0253-3219.2017.hjs.40.120302.

Zhenhui DAI, Shiwu ZHAO, Geng YANG, et al. Monte Carlo simulation and validation of the enhanced dynamic wedge of Varian accelerator[J]. Nuclear techniques, 2017, 40(12): 120302 DOI： 10.11889/j.0253-3219.2017.hjs.40.120302.

摘要

基于蒙特卡罗方法模拟Varian直线加速器扩充型动态楔形板，建立动态楔形板的质量保证新工具。使用BEAMnrc的DYNJAWS组件模拟动态楔形板，建立加速器源模型，用DOSXYZnrc程序计算体模内的深度剂量和离轴剂量，获得不同角度楔形板的楔形因子和离轴剂量分布曲线，与相同条件的测量结果进行对比，验证动态楔形板模型的精确性。蒙特卡罗模拟结果与测量结果取得了很好的一致，偏差小于2%。表明使用蒙特卡罗程序建立扩充型动态楔形板模型是可行的，能够满足临床应用的质量保证需要。

Abstract

Background

Enhanced dynamic wedge (EDW) is commonly used to achieve dose uniformity in the target volume in radiotherapy. However

EDW must be verified before implementation in the treatment planning system.

Purpose

This paper is to simulate the EDW of Varian linear accelerator by Monte Carlo method

and to construct a new tool for quality assurance of EDW.

Methods

EDW is simulated with the DYNJAWS module of BEAMnrc to build the source model. Depth dose and off-axis dose are calculated by use of DOSXYZnrc in a phantom to generate the EDW factor and profiles of EDW at different angles. The model is validated based on the comparison of Monte Carlo simulation and real measurement results.

Results

The simulation results are in good agreement with measurement results

and the deviation is less than 2%.

Conclusion

It demonstrates that the EDW model based on Monte Carlo simulation is effective

which would achieve the requirement of quality assurance of EDW.

关键词

Keywords

references

P W Koken , S Heukelom , J P Cuijpers , . On the practice of the clinical implementation of enhanced dynamic wedges . Medical Dosimetry , 2003 . 28 ( 1 ): 13 - 19 . DOI: 10.1016/S0958-3947(02)00140-1 http://doi.org/10.1016/S0958-3947(02)00140-1 .

P Alaei , P D Higgins . Performance evaluation and quality assurance of Varian enhanced dynamic wedges . Journal of Applied Clinical Medical Physics , 2006 . 7 ( 1 ): 14 - 20 . DOI: 10.1120/jacmp.2027.25367 http://doi.org/10.1120/jacmp.2027.25367 .

于浪 , 杨波 , 李楠 , . 应用二维电离室矩阵进行虚拟楔形板物理参数检测 . 中华放射肿瘤学杂志 , 2015 . 24 ( 3 ): 340 - 343 . DOI: 10.3760/cma.j.issn.1004-4221.2015.03.027 http://doi.org/10.3760/cma.j.issn.1004-4221.2015.03.027 .

Lang YU , Bo YANG , Nan LI , . Dosimetry verification of virtual wedge using a two-dimensional ionization chamber array . Chinese Journal of Radiation Oncology , 2015 . 24 ( 3 ): 340 - 343 . DOI: 10.3760/cma.j.issn.1004-4221.2015.03.027 http://doi.org/10.3760/cma.j.issn.1004-4221.2015.03.027 .

Varian Oncology Systems. C-series clinac enhanced dynamic wedge implementation guide[R]. Varian, 2002:1-166.

D W O Rogers , B A Faddegon , G X Ding , . BEAM:a Monte Carlo code to simulate radiotherapy treatment units . Medical Physics , 1995 . 22 ( 5 ): 503 - 524 . DOI: 10.1118/1.597552 http://doi.org/10.1118/1.597552 .

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 multi-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 .

M B Kakakhel , E S Baveas , A L Fielding , . Validation and automation of the DYNJAWS component module of the BEAMnrc Monte Carlo code . Australasian Physical and Engineering Sciences in Medicine , 2011 . 34 ( 1 ): 83 - 90 . DOI: 10.1007/s13246-011-0060-x http://doi.org/10.1007/s13246-011-0060-x .

F Verhaegen , H H Liu . Incorporating dynamic collimator motion in Monte Carlo simulations:an application in modelling a dynamic wedge . Physics in Medicine and Biology , 2001 . 46 ( 2 ): 287 - 296 . DOI: 10.1088/0031-9155/46/2/302 http://doi.org/10.1088/0031-9155/46/2/302 .

陈亮 , 李玉民 , 徐红 . 瓦里安加速器扩充型动态楔形板楔形因子特性研究 . 中华放射肿瘤学杂志 , 2004 . 13 ( 1 ): 53 - 57 . DOI: 10.3760/j.issn:1004-4221.2004.01.013 http://doi.org/10.3760/j.issn:1004-4221.2004.01.013 .

Liang CHEN , Yumin LI , Hong XU . Characteristics of wedge factor of an enhanced dynamic wedge on Varian 600C accelerator . Chinese Journal of Radiation Oncology , 2004 . 13 ( 1 ): 53 - 57 . DOI: 10.3760/j.issn:1004-4221.2004.01.013 http://doi.org/10.3760/j.issn:1004-4221.2004.01.013 .

J P Gibbons . Calculation of enhanced dynamic wedge factors for symmetric and asymmetric photon fields . Medical Physics , 1998 . 25 ( 8 ): 1411 - 1418 . DOI: 10.1118/1.598313 http://doi.org/10.1118/1.598313 .

S A Oh , S K Kim , M K Kang , . Dosimetric verification of enhanced dynamic wedges by a 2D ion chamber array . Journal of the Korean Physical Society , 2013 . 63 ( 11 ): 2215 - 2219 . DOI: 10.1118/1.4814791 http://doi.org/10.1118/1.4814791 .

A W Beavis , S J Weston , V J Whitton . Implementation of the Varian EDW into a commercial RTP system . Physics in Medicine and Biology , 1996 . 41 ( 9 ): 1691 - 1704 . DOI: 10.1088/0031-9155/41/9/009 http://doi.org/10.1088/0031-9155/41/9/009 .

M Ahmad , J Deng , M W Lund , . Clinical implementation of enhanced dynamic wedges into the pinnacle treatment planning system:Monte Carlo validation and patient-specific QA . Physics in Medicine and Biology , 2009 . 54 ( 2 ): 447 - 465 . DOI: 10.1088/0031-9155/54/2/018 http://doi.org/10.1088/0031-9155/54/2/018 .

J H Moeller , D D Leavitt , E Klein . The quality assurance of enhanced dynamic wedges . Medical Dosimetry , 1997 . 22 ( 3 ): 241 - 246 . DOI: 10.1016/S0958-3947(97)00026-5 http://doi.org/10.1016/S0958-3947(97)00026-5 .

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