한국의학물리학회지:의학물리 (Progress in Medical Physics)

  • 제33권4호
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  • Pages.150-157
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  • 2022
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  • 2508-4445(pISSN)
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  • 2508-4453(eISSN)
한국의학물리학회 (Korean Society of Medical Physics)
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Monte Carlo Algorithm-Based Dosimetric Comparison between Commissioning Beam Data across Two Elekta Linear Accelerators with AgilityTM MLC System

  • Geum Bong Yu (Department of Radiation Oncology, Seoul National University Hospital) ;
  • Chang Heon Choi (Department of Radiation Oncology, Seoul National University Hospital) ;
  • Jung-in Kim (Department of Radiation Oncology, Seoul National University Hospital) ;
  • Jin Dong Cho (Department of Radiation Oncology, Seoul National University Hospital) ;
  • Euntaek Yoon (Interdisciplinary Program in Bioengineering, Seoul National University) ;
  • Hyung Jin Choun (Biomedical Research Institute, Seoul National University Hospital) ;
  • Jihye Choi (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Seoul National University) ;
  • Soyeon Kim (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Seoul National University) ;
  • Yongsik Kim (Department of Veterinary Medical Imaging, Veterinary Medical Teaching Hospital, Seoul National University) ;
  • Do Hoon Oh (Department of Radiation Oncology, Chung-Ang University Gwang Myeong Hospital) ;
  • Hwajung Lee (Department of Radiation Oncology, Chung-Ang University Gwang Myeong Hospital) ;
  • Lee Yoo (Department of Radiation Oncology, Chung-Ang University Gwang Myeong Hospital) ;
  • Minsoo Chun (Institute of Radiation Medicine, Seoul National University Medical Research Center)
  • 투고 : 2022.11.21
  • 심사 : 2022.12.07
  • 발행 : 2022.12.31
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초록

Purpose: Elekta synergy® was commissioned in the Seoul National University Veterinary Medical Teaching Hospital. Recently, Chung-Ang University Gwang Myeong Hospital commissioned Elekta Versa HDTM. The beam characteristics of both machines are similar because of the same AgilityTM MLC Model. We compared measured beam data calculated using the Elekta treatment planning system, Monaco®, for each institute. Methods: Beam of the commissioning Elekta linear accelerator were measured in two independent institutes. After installing the beam model based on the measured beam data into the Monaco®, Monte Carlo (MC) simulation data were generated, mimicking the beam data in a virtual water phantom. Measured beam data were compared with the calculated data, and their similarity was quantitatively evaluated by the gamma analysis. Results: We compared the percent depth dose (PDD) and off-axis profiles of 6 MV photon and 6 MeV electron beams with MC calculation. With a 3%/3 mm gamma criterion, the photon PDD and profiles showed 100% gamma passing rates except for one inplane profile at 10 cm depth from VMTH. Gamma analysis of the measured photon beam off-axis profiles between the two institutes showed 100% agreement. The electron beams also indicated 100% agreement in PDD distributions. However, the gamma passing rates of the off-axis profiles were 91%-100% with a 3%/3 mm gamma criterion. Conclusions: The beam and their comparison with MC calculation for each institute showed good performance. Although the measuring tools were orthogonal, no significant difference was found.

키워드

과제정보

This work was supported by a grant from the National Research Foundation of Korea (NRF) funded by the National Research Foundation of Korea (NRF) and Korean Association for Radiation Application as a part of the Radiation Technology Commercialization Project of the Korean Ministry of Science and ICT (NRF-2019M2D3A2060217, Technology Transfer and Commercialization in the Radiation fields).

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