Suppr超能文献

使用统计过程控制对直线加速器束流监测中稳定性检测装置性能的回顾性研究。

Retrospective study on performance of constancy check device in Linac beam monitoring using Statistical Process Control.

作者信息

Pal Bipasha, Pal Angshuman, Das Suresh, Palit Soura, Sarkar Papai, Mondal Subhayan, Mallik Suman, Goswami Jyotirup, Das Sayan, Sen Arijit, Mondol Monidipa

机构信息

Narayana Superspeciality Hospital, 120/1 Andul Road, Howrah 711103, West Bengal, India.

Department of Mechanical Engineering, Jadavpur University, 188 Raja SC Mallick Road, Kolkata 700032, West Bengal, India.

出版信息

Rep Pract Oncol Radiother. 2020 Jan-Feb;25(1):91-99. doi: 10.1016/j.rpor.2019.12.004. Epub 2019 Dec 10.

Abstract

AIM

To examine the application of Statistical Process Control (SPC) and Ishikawa diagrams for retrospective evaluation of machine Quality Assurance (QA) performance in radiotherapy.

BACKGROUND

SPC is a popular method for supplementing the performance of QA techniques in healthcare. This work investigates the applicability of SPC techniques and Ishikawa charts in machine QA.

MATERIALS AND METHODS

SPC has been applied to recommend QA limits on the particular beam parameters using the QUICKCHECK QA portable constancy check device for 6 MV and 10 MV flattened photon beams from the Elekta Versa HD linear accelerator (Linac). Four machine QA parameters - beam flatness, beam symmetry along gun target direction and left-right direction, and beam quality factor (BQF) - were selected for retrospective analysis. Shewhart charts, Exponentially Weighted Moving Average (EWMA) charts and Cumulative Sum (CUSUM) charts were obtained for each parameter. The root causes for a failure in machine QA were broken down into an Ishikawa diagram enabling the user to identify the root cause of error and rectify the problem subsequently.

RESULTS

Shewhart charts and EWMA charts applied could detect loss in control in one variable in the 6 MV beams and in all four variables in 10 MV beams. CUSUM charts detected offsets in the readings. The Ishikawa chart exhaustively included the possible errors that lead to loss of control.

CONCLUSION

SPC is proven to be effective for detection of loss in control in machine QA. The Ishikawa chart provides the set of probable root causes of machine error useful while troubleshooting.

摘要

目的

研究统计过程控制(SPC)和石川图在放射治疗中机器质量保证(QA)性能回顾性评估中的应用。

背景

SPC是一种用于补充医疗保健中QA技术性能的常用方法。本研究探讨SPC技术和石川图在机器QA中的适用性。

材料与方法

使用QUICKCHECK QA便携式稳定性检测设备,对医科达Versa HD直线加速器(直线加速器)的6MV和10MV扁平光子束的特定射束参数应用SPC,以推荐QA限值。选择四个机器QA参数——射束平坦度、沿枪靶方向和左右方向的射束对称性以及射束质量因子(BQF)——进行回顾性分析。为每个参数获取了休哈特图、指数加权移动平均(EWMA)图和累积和(CUSUM)图。将机器QA失败的根本原因分解到石川图中,以便用户识别错误的根本原因并随后纠正问题。

结果

应用的休哈特图和EWMA图能够检测到6MV射束中一个变量以及10MV射束中所有四个变量的失控情况。CUSUM图检测到读数中的偏移。石川图详尽地列出了导致失控的可能误差。

结论

事实证明,SPC对于检测机器QA中的失控情况是有效的。石川图提供了在故障排除时有用的机器错误可能根本原因集。

相似文献

1
Retrospective study on performance of constancy check device in Linac beam monitoring using Statistical Process Control.
Rep Pract Oncol Radiother. 2020 Jan-Feb;25(1):91-99. doi: 10.1016/j.rpor.2019.12.004. Epub 2019 Dec 10.
2
Retrospective analysis of linear accelerator output constancy checks using process control techniques.
J Appl Clin Med Phys. 2013 Jan 7;14(1):4032. doi: 10.1120/jacmp.v14i1.4032.
5
Moving towards process-based radiotherapy quality assurance using statistical process control.
Phys Med. 2023 Aug;112:102651. doi: 10.1016/j.ejmp.2023.102651. Epub 2023 Aug 8.
6
Using KMeans Clustering to Evaluate and Alert for Deviations of Linac Photon Beam Parameters.
Asian Pac J Cancer Prev. 2024 Jan 1;25(1):305-315. doi: 10.31557/APJCP.2024.25.1.305.
7
Daily QA of linear accelerators using only EPID and OBI.
Med Phys. 2015 Oct;42(10):5584-94. doi: 10.1118/1.4929550.
8
Predictive quality assurance for linear accelerator target failure using statistical process control.
Biomed Phys Eng Express. 2023 Aug 3;9(5). doi: 10.1088/2057-1976/ace6a1.
9
Study on the established customized limits for the daily quality assurance procedure.
J Radiat Res. 2022 Jan 20;63(1):128-136. doi: 10.1093/jrr/rrab079.
10
Monitoring Daily QA 3 constancy for routine quality assurance on linear accelerators.
Phys Med. 2016 Nov;32(11):1479-1487. doi: 10.1016/j.ejmp.2016.10.021. Epub 2016 Nov 10.

引用本文的文献

1
Using KMeans Clustering to Evaluate and Alert for Deviations of Linac Photon Beam Parameters.
Asian Pac J Cancer Prev. 2024 Jan 1;25(1):305-315. doi: 10.31557/APJCP.2024.25.1.305.
2
Automated contouring and statistical process control for plan quality in a breast clinical trial.
Phys Imaging Radiat Oncol. 2023 Aug 23;28:100486. doi: 10.1016/j.phro.2023.100486. eCollection 2023 Oct.
3
Detecting outliers beyond tolerance limits derived from statistical process control in patient-specific quality assurance.
J Appl Clin Med Phys. 2024 Feb;25(2):e14154. doi: 10.1002/acm2.14154. Epub 2023 Sep 8.

本文引用的文献

1
Monitoring anatomical changes of individual patients using statistical process control during head-and-neck radiotherapy.
Phys Imaging Radiat Oncol. 2018 Dec 20;9:21-27. doi: 10.1016/j.phro.2018.12.004. eCollection 2019 Jan.
2
Operational consistency of medical linear accelerators manufactured and commissioned in series.
Tech Innov Patient Support Radiat Oncol. 2018 May 29;7:6-10. doi: 10.1016/j.tipsro.2018.05.001. eCollection 2018 Sep.
4
Applying Lean-Six-Sigma Methodology in radiotherapy: Lessons learned by the breast daily repositioning case.
Radiother Oncol. 2018 May;127(2):326-331. doi: 10.1016/j.radonc.2018.02.019. Epub 2018 Mar 6.
5
Review of the patient positioning reproducibility in head-and-neck radiotherapy using Statistical Process Control.
Radiother Oncol. 2018 May;127(2):183-189. doi: 10.1016/j.radonc.2018.01.006. Epub 2018 Jan 31.
7
Monitoring Daily QA 3 constancy for routine quality assurance on linear accelerators.
Phys Med. 2016 Nov;32(11):1479-1487. doi: 10.1016/j.ejmp.2016.10.021. Epub 2016 Nov 10.
9
A method of setting limits for the purpose of quality assurance.
Phys Med Biol. 2013 Oct 7;58(19):7025-37. doi: 10.1088/0031-9155/58/19/7025. Epub 2013 Sep 17.
10
Retrospective analysis of linear accelerator output constancy checks using process control techniques.
J Appl Clin Med Phys. 2013 Jan 7;14(1):4032. doi: 10.1120/jacmp.v14i1.4032.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验