[an error occurred while processing this directive] | [an error occurred while processing this directive]
Installation product acceptance of Varian Halcyon accelerator
Hu Qiaoqiao, Wu Hao, Jiang Fan, Wang Ruoxi, Wang Meijiao, Zhang Yibao
Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China
AbstractObjective To understand the components, performance, acceptance test and quality assurance (QA) protocols of the new Varian Halcyon accelerator through the procedures of installation product acceptance (IPA). Methods Per Varian IPA protocol, TG-142 for LINAC and TG-148 for tomotherapy QA protocols, the software license, safety interlock, mechanical accuracy, dosimetric performance and imager system were checked thoroughly. Some parameters were benchmarked to the conventional TrueBeam system. Results The system has been fully licensed. Safety interlock was normal. Mechanical accuracy:The maximum deviation of beam stability per gantry rotation was 1.13%. The size of isocenter was>0.59mm. The offsets of MV imager, collimation rotation and absolute gantry rotation were 0.09mm,-0.21° and 0.11°, respectively. The maximum offsets of couch, virtual-to-isocenter were 0.15mm (vertical) and -0.04mm (vertical), respectively. Beam performance:The depth deviation of maximum dose was 0.1cm. The offset of percentage depth dose at 10cm was 0.5%. The maximum deviations of off-axis-intensity, symmetry, and repeatability were 0.9%, 0.94% and -0.44%, respectively. MV imager:The dark field mean pixel value, noise, corrected pixels, defective lines, sensitivity and linearity disparity of dose were 614, 4.4, 3626, 0, 19177, and 0.47%, respectively. All values were within the range of tolerance. Visual check of contrast resolution and small object detection was all satisfactory. Conclusions Without Halcyon-specific TG report or guidelines, manufacture-provided IPA manual can be helpful with the installation of acceptance and QA protocols. IPA has been successfully performed for Halcyon at Peking University Cancer Hospital. The automated workflow improves the clinical efficiency by simplifying the operations.
Fund:National Key R&D Program of China (2019YFF01014405);National Natural Science Foundation of China (11505012);Science Foundation of Peking University Cancer Hospital (2021-1);Fundamental Research Funds for the Central Universities/Peking University Clinical Medicine Plus X-Young Scholars Project (PKU2021LCXQ027)
Hu Qiaoqiao,Wu Hao,Jiang Fan et al. Installation product acceptance of Varian Halcyon accelerator[J]. Chinese Journal of Radiation Oncology, 2021, 30(7): 712-716.
Hu Qiaoqiao,Wu Hao,Jiang Fan et al. Installation product acceptance of Varian Halcyon accelerator[J]. Chinese Journal of Radiation Oncology, 2021, 30(7): 712-716.
[1] Varian Medical Systems. Halcyon customer release note version 1.0[Z]. 2017. [2] 李成强,陶城,陈进琥,等. 一种新型加速器的乳腺癌固定野调强放射治疗中计划质量和执行效率评价[J]. 中华放射医学与防护杂志, 2019, 39(8):614-618. DOI:10.3760/cma.j.issn.0254-5098.2019.08.010. Li CQ, Tao C, Chen JH, et al. The plan quality and delivery efficiency of intensity modulated radiotherapy on a new designed linac for left side breast cancer[J]. Chin J Radiol Med Prot, 2019, 39(8):614-618. DOI:10.3760/cma.j.issn.0254-5098.2019.08.010. [3] 李成强,陈进琥,李振江,等. 基于Halcyon和Trilogy固定野调强计划质量和执行效率应用研究[J]. 中华放射肿瘤学杂志,2019, 28(1):57-60. DOI:10.3760/cma.j.issn.1004-4221.2019.01.012. Li CQ, Chen JH, Li ZJ, et al. The dosimetric and delivery efficiency between Halcyon-and Trilogy-based IMRT plans[J]. Chin J Radiat Oncol, 2019, 28(1):57-60. DOI:10.3760/cma.j.issn.1004-4221.2019.01.012. [4] Klein EE, Hanley J, Bayouth J, et al. Task group 142 report:quality assurance of medical accelerators[J]. Med Phys, 2009, 36(9):4197-4212. DOI:10.1118/1.3190392. [5] Langen KM, Papanikolaou N, Balog J, et al. QA for helical tomotherapy:report of the AAPM task group 148[J]. Med Phys, 2010, 37(9):4817-4853. DOI:10.1118/1.3462971. [6] Lloyd S, Lim TY, Fave X, et al. TG-51 reference dosimetry for the HalcyonTM:a clinical experience[J]. J Appl Clin Med Phys, 2018, 19(4):98-102. DOI:10.1002acm2.12349. [7] Varian Medical Systems. Halcyon installation product acceptance, IPA-AL-B[Z]. 2017. [8] Clivio A, Vanetti E, Rose S, et al. Evaluation of the machine performance check application for TrueBeam Linac[J]. Radiat Oncol, 2015, 10(1):97. DOI:10.1186/s13014-015-0381-0. [9] Barnes MP, Greer PB. Evaluation of the truebeam machine performance check (MPC) geometric checks for daily IGRT geometric accuracy quality assurance[J]. J Appl Clin Med Phys, 2017, 18(3):200-206. DOI:10.1002acm2.12064. [10] Barnes MP, Greer PB. Evaluation of the TrueBeam machine performance check (MPC) beam constancy checks for flattened and flattening filter-free (FFF) photon beams[J]. J Appl Clin Med Phys, 2017, 18(1):139-150. DOI:10.1002acm2.12016. [11] Barnes MP, Greer PB. Evaluation of the truebeam machine performance check (MPC):mechanical and collimation checks[J]. J Appl Clin Med Phys, 2017, 18(3):56-66. DOI:10.1002acm2.12072. [12] Li Y, Netherton T, Nitsch PL, et al. Independent validation of machine performance check for the Halcyon and TrueBeam linacs for daily quality assurance[J]. J Appl Clin Med Phys, 2018, 19(5):375-382. DOI:10.1002acm2.12391. [13] Fogliata A, Garcia R, Knoos T, et al. Definition of parameters for quality assurance of flattening filter free (FFF) photon beams in radiation therapy[J]. Med Phys, 2012, 39(10):6455-6464. DOI:10.1118/1.4754799. [14] Das IJ, Cao M, Cheng CW, et al. A quality assurance phantom for electronic portal imaging devices[J]. J Appl Clin Med Phys, 2011, 12(2):3350. DOI:10.1120/jacmp.v12i2.3350. [15] 胡俏俏,蒋璠,王美娇,等. 瓦里安Portal Dosimetry和PTW 1500矩阵在HalcyonTM治疗计划剂量验证的对比研究[J]. 中华放射医学与防护杂志,2019, 39(1):58-62. DOI:10.3760/cma.j.issn.0254-5098.2019.01.011. Hu QQ, Jiang F, Wang MJ, et al. A comparative study of dosimetric verification of HalcyonTM treatment plans using Varian Portal Dosimetry and PTW array 1500[J]. Chin J Radiol Med Prot, 2019, 39(1):58-62. DOI:10.3760/cma.j.issn.0254-5098.2019.01.011. [16] 刘卓伦,张艺宝,岳海振,等. 医用直线加速器中心轴绝对剂量输出长期稳定性对比分析[J]. 中国医学物理学杂志, 2016, 33(1):1-5. DOI:10.3969/j.issn.1005-202X.2016.01.001. Liu ZL, Zhang YB, Yue HZ, et al. Comparative analysis on long-term stability of absolute dose output at central axis of medical linear accelerators[J]. Chin J Med Phys, 2016, 33(1):1-5. DOI:10.3969/j.issn.1005-202X.2016.01.001. [17] Cai B, Laugeman E, Mazur TR, et al. Characterization of a prototype rapid kilovoltage X-ray image guidance system designed for a ring shape radiation therapy unit[J]. Med Phys, 2019, 46(3):1355-1370. DOI:10.1002/mp.13396. [18] 黄宇亮,李晨光,毛凯,等. 引导螺旋断层放疗用兆伏CT图像质量定量分析[J]. 北京大学学报(医学版), 2019, 51(3):525-529. DOI:10.19723/j.issn.1671-167X.2019.03.022. Huang YL, Li CG, Mao K, et al. Quantitative evaluation of image quality of megavoltage computed tomography for guiding helical tomotherapy[J]. J Pek Univers (Health Sci), 2019, 51(3):525-529. DOI:10.19723/j.issn.1671-167X.2019.03.022. [19] Huang Y, Wu H, Hu Q, et al. Dose calculation deviations induced by fractional image-guided-couch-shifts for Varian Halcyon MV cone beam CT[J]. Phys Med, 2019, 58:66-71. DOI:10.1016/j.ejmp.2019.01.015. [20] Huang Y, Du Y, Li C, et al. Pediatric cone beam CT on Varian Halcyon and TrueBeam radiotherapy systems:radiation dose and positioning accuracy evaluations[J]. J Radiol Prot, 2019, 39(3):739-748. DOI:10.1088/1361-6498/ab1e74.
2021, Vol. 30 
