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Elekta加速器VMAT治疗工作特性研究 被引量：4

Investigation of Elekta Linac Characteristics for VMAT
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摘要 为了探索Elekta加速器执行容积旋转调强(VMAT)治疗时的工作特性,本研究选取5例VMAT计划在维修模式下进行模拟治疗,记录和分析治疗过程中加速器的剂量率、机架和MLC叶片的运动数据。结果表明,治疗过程中剂量率在6个剂量率间跳变,机架和MLC速度也动态改变。VMAT技术要求加速器动态地控制相关参数,而这些参数可以通过记录数据进行检查,因此VMAT的临床应用,需要加强加速器VMAT相关参数的质量保证。 The aim of this study is to investigate the characteristics of Elekta delivery system for volumetric modulated arc therapy （VMAT）.Five VMAT plans were delivered in service mode and dose rates,and speed of gantry and MLC leaves were analyzed by log files.Results showed that dose rates varied between 6 dose rates,Gantry and MLC leaf speed dynamically varied during delivery.Conclusion：The technique of VMAT requires linac to dynamically control more parameters,and these key dynamic variables during VMAT delivery can be checked by log files.Quality assurance procedure should be carried out for VMAT related parameter.
作者 罗广文 张焜毅
机构地区 中山大学肿瘤防治中心华南肿瘤学国家重点实验室
出处 《中国医疗器械杂志》 CAS 2012年第1期22-24,共3页 Chinese Journal of Medical Instrumentation
关键词 IMRT 容积旋转调强 加速器 剂量率 IMRT VMAT linac dose rate
分类号 R815 [医药卫生—放射医学]
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参考文献6

  • 1Yu CX. Intensity-modulated arc therapy with dynamic multi-leaf collimation: An alternative to tomotherapy[J]. Phys Med Biol, 1995, 40:1435-1439.
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  • 3Min Rao, Wensha Yang, Fan Chen, et al. Comparison of Elekta VMAT with helical tomotherapy and fixed field IMRT:PIan quality, delivery efficiency and accuracy[J]. Med Phys, 20|0, 37:1350- 1359.
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同被引文献45

  • 1张矛,金海国,卜明伟,孙宝胜,孙术全,苏清秀,李玉平.脑胶质瘤术后VMAT与IMRT放疗技术间比较[J].中国医学物理学杂志,2011,28(6):2959-2963. 被引量：30
  • 2Otto K.Volumetric modulated arc therapy:IMRT in a single gantry arc[J].Med Phys,2008,35(1):310-317.DOI:10.1118/1.2818738.
  • 3Palms D,Vollans E,James K,et al. Volumetric modulated arc therapy for delivery of prostate radiotherapy:comparison with intensity-modulated radiotherapy and three-dimensional conformal radiotherapy[J].Int J Radiat Oncol Biol Phys,2008,72(4):996-1001.DOI:10.1016/j.ijrobp.2008.02.047.
  • 4Cao DL,Holmes TW,Afghan MKN,et al. Comparison of plan quality provided by intensity-modulated arc therapy and helical Tomotherapy[J].Int J Radiat Oncol Biol Phys,2007,69(1):240-250.DOI:10.1016/j.ijrobp.2007.04.073.
  • 5Bedford JL,Warrington AP.Commissioning of volumetric modulated arc therapy (VMAT)[J].Int J Radiat Oncol Biol Phys,2009,73(2):537-545.DOI:10.1016/j.ijrobp.2008.08.055.
  • 6Ling CC,Zhang PP,Archambault Y,et al. Commissioning and quality assurance of RapidArc radiotherapy delivery system[J].Int J Radiat Oncol Biol Phys,2008,72(2):575-581.DOI:10.1016/j.ijrobp.2008.05.060.
  • 7Ezzell GA,Burmeister JW,Dogan N,et al. IMRT commissioning:multiple institution planning and dosimetry comparisons,a report from AAPM Task Group 119[J].Med Phys,2009,36(11):5359-5373.
  • 8Kaurin DGL,Sweeney LE,Marshall EI,et al. VMAT testing for an Elekta accelerator[J].J Appl Clin Med Phys,2012,13(2):55-72.DOI:10.1120/jacmp.v13i2.3725.
  • 9Bedford JL,Thomas MD,Smyth G.Beam modeling and VMAT performance with the Agility 160-leaf multileaf collimator[J].J Appl Clin Med Phys,2013,14(2):4136.DOI:10.1120/jacmp.v14i2.4136.
  • 10Cosgrove VP,Thomas MDR,Weston SJ,et al. Physical characterization of a new concept design of an Elekta radiation head with integrated 160-leaf multi-leaf collimator[J].Int J Radiat Oncol Biol Phys,2009,75(3 Suppl):S722-S723.DOI:10.1016/j.ijrobp.2009.07.1646.

引证文献4

二级引证文献15

中国医疗器械杂志
2012年 第1期

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