The comparison of output constancy on linear accelerator between myQA Daily and Machine Performance Check

Authors

  • Wisan Arphasetthasakul Division of Radiation Oncology, Department of Radiology, King Chulalongkorn Memorial Hospital, Rama IV Road, Bangkok 10330 Thailand
  • Yupawadee Chotmit Division of Radiation Oncology, Department of Radiology, King Chulalongkorn Memorial Hospital, Rama IV Road, Bangkok 10330 Thailand
  • Nichapa Suthon Division of Radiation Oncology, Department of Radiology, King Chulalongkorn Memorial Hospital, Rama IV Road, Bangkok 10330 Thailand
  • Jumnong Kumkhwao Division of Radiation Oncology, Department of Radiology, King Chulalongkorn Memorial Hospital, Rama IV Road, Bangkok 10330 Thailand
  • Nussara Arphasetthasakul Division of Radiation Oncology, Department of Radiology, King Chulalongkorn Memorial Hospital, Rama IV Road, Bangkok 10330 Thailand

Keywords:

Linear accelerator, Quality assurance, myQA Daily, Machine Performance Check

Abstract

Background: The daily output measurement of the linear accelerator is essential in sophisticated radiation techniques. The myQA Daily and the Machine Performance Check (MPC) can be used to assure the daily quality assurance of the linear accelerators in daily output measurements. Objective: this study is to compare the efficiency of two quality assurance tools, myQA Daily and MPC, in measuring the daily output measurement linear accelerators. Methods: The data of daily output were obtained for three months with myQA Daily and MPC measurements from the Varian TrueBeam at 6 MV, 6 MV-FFF photon beams and 6 MeV electrons. Results: the mean difference of daily output by the myQA Daily and MPC was no more than 1.00% and the largest difference was 1.07% at 6 MV photon beams. The concordance correlation coefficient was 0.68, 0.80 and 0.66 for 6 MV, 6 MV FFF and 6 MeV respectively. The Pearson correlation was 0.93, 0.89 and 0.80 for 6 MV, 6 MV FFF and 6 MeV respectively.  Conclusions: he results from myQA and MPC show well agreement and correlation. The percentage difference from the daily dose measurement is not more than 2%.

References

สาขารังสีรักษา และมะเร็งวิทยาคณะแพทยศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย. รังสีรักษา.2559 [เข้าถึงเมื่อ 25 กรกฎาคม 2564]. เข้าถึงได้จาก http://chulacancer.net

พันทิวา อุณห์ศิริ. การประกันคุณภาพเครื่องฉายรังสีรุ่น TrueBEAM ด้วยวิธี Machine Performance Check (MPC). Journal of Thai Association of Radiation Oncology. 2018 Jun 28;24(1): 45-52.

Podgarsak EB. Radiation oncology physics : a handbook for teachers and student Vienna: International Atomic Energy Agency ; 2005.

Pearson M, Eaton D, Greener T. Long‐term experience of MPC across multiple TrueBeam linacs: MPC concordance with conventional QC and sensitivity to real‐world faults. Journal of Applied Clinical Medical Physics. 2020 Aug;21(8): 224-35.

Klein EE, Hanley J, Bayouth J, Yin FF, Simon W, Dresser S, Serago C, Aguirre F, Ma L, Arjomandy B, Liu C. Task Group 142 report: Quality assurance of medical accelerators a. Medical physics. 2009 Sep;36(9Part1): 4197-212.

Klein EE, Hanley J, Bayouth J, Yin F, Simon W, Dresser S, Serago C, Aguirre F, Ma L, Arjomandy B, Liu C. Quality assurance of medical accelerators: report of AAPM Radiation Therapy Committee Task Group 142. Med Phys. 2009; 36:4197-212.

Clivio A, Vanetti E, Rose S, Nicolini G, Belosi MF, Cozzi L, Baltes C, Fogliata A. Evaluation of the machine performance check application for TrueBeam linac. Radiation Oncology. 2015 Dec;10(1):1-1.

นภปิณฑ์ โสวรรณะ, ปณิดา ศิลป์ประกอบ, ภัทราวดี พรมงูเหลือม, สรจรส อุณห์ศิริ, ศักดา กิ่งแก้ว. การประเมินประสิทธิภาพเครื่อง myQA Daily สำหรับการวัดปริมาณรังสี ของเครื่องเร่งอนุภาค Performance evaluation of myQA Daily for output constancy check on linear accelerator, Journal of Thai Association of Radiation Oncology, Vol.24, No.1, July-December 2021: 1-12.

Barnes MP, Greer PB. Evaluation of the TrueBeam machine performance check (MPC) beam constancy checks for flattened and flattening filter_free (FFF) photon beams. Journal of applied clinical medical physics. 2017 Jan;18(1): 139-50.

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Published

2022-10-10

How to Cite

1.
Arphasetthasakul W, Chotmit Y, Suthon N, Kumkhwao J, Arphasetthasakul N. The comparison of output constancy on linear accelerator between myQA Daily and Machine Performance Check. Thai J Rad Tech [Internet]. 2022 Oct. 10 [cited 2024 Apr. 27];47(1):17-22. Available from: https://he02.tci-thaijo.org/index.php/tjrt/article/view/254604

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