射波刀VSI系统的主要性能测试

doi:10.3760/cma.j.issn.1004-4221.2018.10.011

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摘要

目的测试射波刀VSI系统实施立体定向放疗的准确性和可靠性。方法对射波刀VSI系统的机器人系统、患者定位系统、目标定位系统、加速器系统、可变准直器系统5个子系统的性能分别进行测试,记录机器人系统机械臂到位精度、患者定位系统的床到位精度、目标定位系统的追踪精度、加速器系统相关剂量学参数和可变准直器系统重复性。对射波刀VSI系统综合投照精度进行端到端(E2E)的系统测试。结果机器人系统所有节点机械臂运动的平均到位偏差≤0.1 mm,单个节点最大到位偏差≤0.29 mm。可变准直器系统所有尺寸孔径重复性误差≤0.28 mm。床到位精度与追踪精度均<0.2 mm和0.5°。固定和可变2种类型准直器系统激光束与辐射射束中心偏差≤0.4 mm。6 mV射线的射线质与离轴比曲线等参数均在正常范围内。射波刀剂量输出稳定性、线性与随射束角度变化的差异均<1.0%。固定和可变2种类型准直器的透射因子均<0.4%。射波刀VSI系统综合投照精度的E2E测试最大偏差为0.87 mm。结论射波刀VSI系统能够准确、精确地实施立体定向放疗。

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	张喜乐
	杨瑞杰
	李君
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	王俊杰

关键词 ：射波刀VSI系统, 验收测试, 可变准直器系统, 立体定向放射疗法

Abstract：

Objective To evaluate the accuracy and reliability of the CyberKnife VSI system for stereotactic radiotherapy. Methods First,the mechanical accuracy of the robotic manipulator system,the repeatability of the Iris variable aperture collimator system,the couch position accuracy of the patient positioning system,the tacking precision of the target locating system and the dosimetric beam characteristics of the linac system for each subsystem of CyberKnife VSI system were tested. Finally,the total beam delivery precision of the CyberKnife VSI system was evaluated. Results The mean positioning deviations of the mechanical arm movement of the robotic manipulator system were less than 0.1 mm,and the maximum positioning deviation of single note was ≤ 0.29 mm. The repeatability of the aperture sizes for the Iris variable aperture collimator system was ≤ 0.28 mm. The couch position accuracy of the patient positioning system was<0.2 mm and the tracking precision of the target locating system was less than 0.5°. The linac beam-laser beam axes coincidence between the Iris and fixed collimators was better than 0.4 mm. The 6-MV beam parameters,such as beam quality and profile,were found within the acceptance limits. The deviations of output reproducibility,linearity and constancy versus linac orientation were less than 1.0%. The transmission factors of two types of collimators were lower than 0.4%. End-to-end test demonstrated that the maximum deviation of the total delivery precision of CyberKnife VSI system was 0.87 mm. Conclusion The CyberKnife VSI system is accurate and reliable for stereotactic radiotherapy.

Key words： CyberKnife VSI system Performance evaluation Iris variable aperture collimator system Stereotactic radiotherapy

收稿日期: 2017-07-28

基金资助:

国家自然科学基金资助项目(81071237、81372420)

通讯作者: 杨瑞杰,Email: ruijyang@yahoo.com

引用本文:

张喜乐,杨瑞杰,李君等. 射波刀VSI系统的主要性能测试[J]. 中华放射肿瘤学杂志, 2018, 27(10): 925-929.

Zhang Xile,Yang Ruijie,Li Jun et al. Performance Evaluation of a CyberKnife VSI^TM System[J]. Chinese Journal of Radiation Oncology, 2018, 27(10): 925-929.

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http://journal12.magtechjournal.com/Jweb_fszlx/CN/10.3760/cma.j.issn.1004-4221.2018.10.011 或 http://journal12.magtechjournal.com/Jweb_fszlx/CN/Y2018/V27/I10/925

[1] 庄洪卿,袁智勇,王平,等.局部无进展生存评价射波刀治疗外周型肺肿瘤局部疗效价值[J].中华放射肿瘤学杂志,2013,22(2):115-117.DOI:10.3760/cma.j.issn.1004-4221.2013.02.008.
Zhuang HQ,Yuan ZY,Wang P,et al. Value of local progression-free survival for evaluating local outcome of peripheral lung cancer treated by cyberknife[J].Chin J Radiat Oncol,2013,22(2):115-117.DOI:10.3760/cma.j.issn.1004-4221.2013.02.008.
[2] Golanov A V,Gorlachev G E,Antipina N A,et al.[CyberKnife stereotactic radiotherapy for mass lesions of the spinal cord and spine][J].Zh Vopr Neirokhir Im N N Burdenko,2012,76(1):54-62,63.
[3] Gerszten P C,Ozhasoglu C,Burton S A,et al. CyberKnife frameless single-fraction stereotactic radiosurgery for benign tumors of the spine[J].Neurosurg Focus,2003,14(5):e16.DOI:10.3171/foc.2003.15.2.7.
[4] 庄洪卿,袁智勇,宋勇春,等.不同追踪方式对射波刀治疗肺肿瘤近期疗效的影响[J].中华放射肿瘤学杂志,2013,22(1):36-38.DOI:10.3760/cma.j.issn.1004-4221.2013.01.011.
Zhuang HQ,Yuan ZY,Song YC,et al.mpacts of different tracking methods on short-term therapeutic effect of cyberknife in treatment of lung cancer[J].Chin J Radiat Oncol,2013,22(1):36-38.DOI:10.3760/cma.j.issn.1004-4221.2013.01.011.
[5] Chalkley A,Heyes G.Evaluation of a synthetic single-crystal diamond detector for relative dosimetry measurements on a CyberKnife[J].Br J Radiol,2014,87(1035):20130768.DOI:10.1259/bjr.20130768.
[6] Dieterich S,Cavedon C,Chuang C F,et al. Report of AAPM TG 135:quality assurance for robotic radiosurgery[J].Med Phys,2011,38(6):2914-2936.DOI:10.1118/1.3579139.
[7] Wilcox EE,Daskalov GM.Evaluation of GAFCHROMIC EBT film for Cyberknife dosimetry[J].Med Phys,2007,34(6):1967-1974.DOI:10.1118/1.2734384.
[8] 张喜乐,杨瑞杰,李君,等.四种探测器测量射波刀离轴比曲线的比较分析[J].中华放射医学与防护杂志,2017,37(9):671-676.DOI:10.3760/cma.j.issn.0254-5098.2017.09.006.
Zhang XL,Yang RJ,Li J,et al. Comparative analysis of four detectors for the profile measurement using CyberKnife[J].Chin J Radiol Med Protect,2017,37(9):671-676.DOI:10.3760/cma.j.issn.0254-5098.2017.09.006.
[9] Sharma SC,Ott JT,Williams JB,et al. Commissioning and acceptance testing of a CyberKnife linear accelerator[J].J Appl Clin Med Phys,2007,8(3):2473.DOI:10.1120/jacmp.v8i3.2473.
[10] Blanck O,Masi L,Damme MC,et al. Film-based delivery quality assurance for robotic radiosurgery:commissioning and validation[J].Phys Med,2015,31(5):476-483.DOI:10.1016/j.ejmp.2015.05.001.
[11] Blanck O,Masi L,Chan M K,et al. High resolution ion chamber array delivery quality assurance for robotic radiosurgery:commissioning and validation[J].Phys Med,2016,32(6):838-846.DOI:10.1016/j.ejmp.2016.05.060.
[12] Antypas C,Pantelis E.Performance evaluation of a CyberKnife G4 image-guided robotic stereotactic radiosurgery system[J].Phys Med Biol,2008,53(17):4697-4718.DOI:10.1088/0031-9155/53/17/016.
[13] Echner GG,Kilby W,Lee M,et al. The design,physical properties and clinical utility of an iris collimator for robotic radiosurgery[J].Phys Med Biol,2009,54(18):5359-5380.DOI:10.1088/0031-9155/54/18/001.
[14] Murphy MJ,Cox RS.The accuracy of dose localization for an image-guided frameless radiosurgery system[J].Med Phys,1996,23(12):2043-2049.DOI:10.1118/1.597771.
[15] Andreo P,Burns DT,Hohlfeld K,et al. Absorbed dose determination in external beam radiotherapy:an international code of practice for dosimetry based on standards of absorbed dose to water[J].Report Newsmagaz,2000,11(October).DOI:10.1097/00004032-200111000-00017.
[16] Dieterich S,Gibbs IC.The CyberKnife in clinical use:current roles,future expectations[J].Front Radiat Ther Oncol,2011,43:181-194.DOI:10.1159/000322423.
[17] Heidorn SC,Kremer N,Furweger C.A novel method for quality assurance of the cyberknife iris variable aperture collimator[J].Cureus,2016,8(5):e618.DOI:10.7759/cureus.618.
[18] Furweger C,Prins P,Coskan H,et al. Characteristics and performance of the first commercial multileaf collimator for a robotic radiosurgery system[J].Med Phys,2016,43(5):2063.DOI:10.1118/1.4944740.
[19] Hurkmans CW,Remeijer P,Lebesque JV,et al. Set-up verification using portal imaging;review of current clinical practice[J].Radiother Oncol,2001,58(2):105-120.DOI:10.1016/S0167-8140(00)00260-7.