Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Evaluation of Targeting Using Marker Seed Phantom

Maker Seed Phantom을 이용한 표적위치의 정확성 평가

  • Jang, Eun-Sun (Department of Radiation Oncology, Kosin University Gospel Hospital) ;
  • Jeong, Bong-Jae (Department of Radiological Science of Korea International University) ;
  • Im, In-Chul (Department of Radiological Science, Dongeui University) ;
  • Kang, Su-Man (Department of Radiation Oncology, Kosin University Gospel Hospital)
  • 장은성 (고신대학교 복음병원 방사선종양학과) ;
  • 정봉재 (한국국제대학교 방사선학과) ;
  • 임인철 (동의대학교 방사선학과) ;
  • 강수만 (고신대학교 복음병원 방사선종양학과)
  • Received : 2011.02.21
  • Accepted : 2011.04.12
  • Published : 2011.04.30
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Abstract

Accuracy control of Linear accelerator installed in OBI is done daily and weekly and importance of accuracy multiplies exponentially at that moment. Purpose of this experiment is everyday and twice a week over a four month period (march~june) 2009 year to confirm maintenance of accuracy through Quality control of OBI. In short, measurement of exponentially multiplying accuracy of OBI and regular accuracy control was able to maintain accuracy from the center of treatment within 0.1 cm. Therefore, evaluation of exponentially multiplying accuracy using OBI accuracy control linear accelerator phantom on daily, weekly basis was confirmed.

선형가속기에 설치된 OBI (On-Board $Imager^{TM}$ Varian Medical Systems. USA)의 정도관리는 일간 및 주간으로 하고 있으며 이때 기하학적인 정확성은 매우 중요하게 된다. 본 실험에서 4개월간 선형가속기의 OBI 장치 정도관리용 팬톰을 사용하여 일간과 주간으로 선형가속기의 기계적인 중심점(isocenter)과 가시화된 레이저의 중심점의 일치정도 및 OBI 장치 및 레이저의 중심점을 비교하여 데이터화함으로써 OBI 장치의 기계적 정확성과 정도관리용 팬톰을 사용하여 일간, 주간으로 선형가속기 환자위치 및 레이저의 등 중심점을 체크하여 데이터화함으로써 사후관리 및 환자치료 성적을 높일 수 있다고 사료된다.

Keywords

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