Journal of Radiation Protection and Research

  • 제34권3호
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  • Pages.107-114
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  • 2009
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  • 2508-1888(pISSN)
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  • 2466-2461(eISSN)
대한방사선방어학회 (The Korean Association for Radiation Protection)
권호 표지

4-D 전산모사 기법을 이용한 호전형 컴프턴 카메라의 영상 특성 평가

Image Quality of a Rotating Compton Camera Evaluated by Using 4-D Monte Carlo Simulation Technique

  • 서희 (한양대학교 원자력공학과) ;
  • 이세형 (울산대학교 의과대학 서울아산병원 방사선종양학과) ;
  • 박진형 (한양대학교 원자력공학과) ;
  • 김찬형 (한양대학교 원자력공학과) ;
  • 박성호 (울산대학교 의과대학 서울아산병원 방사선종양학과) ;
  • 이주한 (중앙대학교 물리학과) ;
  • 이춘식 (중앙대학교 물리학과) ;
  • 이재성 (서울대학교 핵의학교실)
  • Seo, Hee (Department of Nuclear Engineering, Hanyang University) ;
  • Lee, Se-Hyung (Department of Radiation Oncology, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Park, Jin-Hyung (Department of Nuclear Engineering, Hanyang University) ;
  • Kim, Chan-Hyeong (Department of Nuclear Engineering, Hanyang University) ;
  • Park, Sung-Ho (Department of Radiation Oncology, Asan Medical Center, College of Medicine, University of Ulsan) ;
  • Lee, Ju-Hahn (Department of Physics, Chung-Ang University) ;
  • Lee, Chun-Sik (Department of Physics, Chung-Ang University) ;
  • Lee, Jae-Sung (Department of Nuclear Medicine and Interdisciplinary Program in Radiation Applied Life Science, Seoul National University)
  • 발행 : 2009.09.30
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초록

컴프턴 카메라는 컴프턴 산란 현상에 기반을 둔 감마선 영상장치로 기존의 영상장치가 가지는 여러 가지 한계점들을 극복할 수 있어서 차세대 영상장치로 관심을 받고 있다. 본 연구에서는 4-D 전산모사 기법을 이용하여 회전형 컴프턴 카메라의 영상 특성을 평가하였으나, 원자력 산업용으로 활용될 수 있는 컴프턴 카메라에 대하여 가능성을 확인하여 보았다. 고정된 시스템 보다는 선원 주위를 회전하여 영상을 획득할 경우 선원의 위치 및 분포를 상대적으로 정확하게 결정할 수 있음을 확인하였다. 또한, 컴프턴 카메라의 3차원 영상가능을 통해 대형 원자력 시설해체 시 콘크리트 벽안에 존재하는 방사화된 철근구조의 위치 및 분포를 한 쪽 벽면에서 정확히 결정할 수 있음을 확인하였다. 본 연구에서 활용한 4-D 전산모사 기법은 컴프턴 카메라 분야에 최초로 적용된 기술이며, 이는 움직이는 장기 및 LINAC 켄트리, 4-D CT 등 동적 구조에 대한 모델링이 가능하므로 다양한 응용분야에서 활용될 수 있을 것으로 기대한다.

A Compton camera, which is based on Compton kinematics, is a very promising gamma-ray imaging device in that it could overcome the limitations of the conventional gamma-ray imaging devices. In the present study, the image quality of a rotating Compton camera was evaluated by using 4-D Monte Carlo simulation technique and the applicability to nuclear industrial applications was examined. It was found that Compton images were significantly improved when the Compton camera rotates around a gamma-ray source. It was also found that the 3-D imaging capability of a Compton camera could enable us to accurately determine the 3-D location of radioactive contamination in a concrete wall for decommissioning purpose of nuclear facilities. The 4-D Monte Carlo simulation technique, which was applied to the Compton camera fields for the first time, could be also used to model the time-dependent geometry for various applications.

키워드

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