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Journal of the Korean Physical Society

, Volume 76, Issue 3, pp 257–263 | Cite as

Dosimetric Comparison of Four Commercial Patient-Specific Quality Assurance Devices for Helical Tomotherapy

  • Kyung Hwan Chang
  • Dong Wook Kim
  • Jung Hoan Choi
  • Han-Back Shin
  • Chae-Seon Hong
  • Dong Min Jung
  • Joo Ho Kim
  • Jihun Kim
  • Mincheol Han
  • Ho Lee
  • Kwangwoo ParkEmail author
  • Jin Sung KimEmail author
  • Jaeho Cho
  • Yong Bae Kim
  • Joo Ah Lee
Article

Abstract

In this study, the delivery quality assurance (DQA) results of commercially available dosimetric systems (ionization chamber and EBT film, MapCHECK, ArcCHECK, and dosimetry check (DC) software) for helical tomotherapy (HT) were compared, and the feasibility of performing pretreatment using MapCHECK, ArcCHECK, and DC for HT, instead of ionization chambers and EBT films, was assessed. Sixty-five HT-treated patients were considered. Point dose differences, dose profiles, and gamma passing rates were used to evaluate the agreement between the calculated and the measured data, and the outcomes of the four DQA devices were compared in various clinical cases. The calculated and the measured point doses were within ±5% of each other. In terms of the root-mean-square error (RMSE), the point dose differences were within 2.9 for the four tested devices in all of the studied cases. Gamma analysis was performed based on the 3%/3 mm and 2%/2 mm passing rate criteria. In terms of the average RMSE, the gamma passing rates of the four tested DQA devices were within 2.85 (3%/3 mm) and 7.30 (2%/2 mm). These DQA systems could be used interchangeably for routine DQA pretreatment in HT cases.

Keywords

Pretreatment DQA MapCHECK ArcCHECK Dosimetry Check Helical tomotherapy 

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Notes

Acknowledgments

This work was supported by the Radiation Technology R&D program through the National Research Foundation of Korea funded by the Ministry of Science and ICT (Grant nos. NRF-2017M2A2A6A01071192, NRF-2017-M2A2A6A01071189, NRF-2017M2A2A6A01070330, and NRF-2018R1D1A1B07050217).

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Copyright information

© The Korean Physical Society 2020

Authors and Affiliations

  • Kyung Hwan Chang
    • 1
  • Dong Wook Kim
    • 1
  • Jung Hoan Choi
    • 1
  • Han-Back Shin
    • 1
  • Chae-Seon Hong
    • 1
  • Dong Min Jung
    • 1
  • Joo Ho Kim
    • 1
  • Jihun Kim
    • 1
  • Mincheol Han
    • 1
  • Ho Lee
    • 1
  • Kwangwoo Park
    • 1
    Email author
  • Jin Sung Kim
    • 1
    Email author
  • Jaeho Cho
    • 1
  • Yong Bae Kim
    • 1
  • Joo Ah Lee
    • 2
    • 3
  1. 1.Department of Radiation Oncology, Yonsei Cancer CenterYonsei University College of MedicineSeoulKorea
  2. 2.Department of Radiation OncologyCatholic University of Korea Incheon St. Mary’s HospitalIncheonKorea
  3. 3.Department of Biomedical ScienceKorea UniversitySejongKorea

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