휘진성 형광체 (BaFBr:$Eu^{2+}$)를 이용한 영상의학분야에서 산란선 특성에 관한 평가

Evaluation of Scatter Radiation in Digital Radiological Condition by using Photostimulated Luminescence (BaFBr:$Eu^{2+}$)

  • 민정환 (신구대학교 방사선과) ;
  • 한성규 (고려대학교 대학원 바이오융합공합과) ;
  • 김정민 (고려대학교 보건과학대학 방사선학과) ;
  • 이주아 (가톨릭대학교 인천성모병원 방사선종양학과) ;
  • 김기원 (삼성서울병원 영상의학과) ;
  • 정회원 (백석문화대학교 방사선과)
  • Min, Jung-Whan (Department of Radiological Science, Shin-Gu University) ;
  • Han, Seong-Gyu (Department of Bio-convergence engineering, Graduate school, Korea University) ;
  • Kim, Jung-Min (Department of Radiological Science, Korea University) ;
  • Lee, Joo-Ah (Department of Oncology, Catholic University of Korea Incheon St.Mary's Hospital) ;
  • Kim, Ki-Won (Department of Radiology, Samsung Medical Center) ;
  • Jeong, Hoi-Woun (Department of Radiological Science, Beakseok Culture University)
  • 투고 : 2014.04.30
  • 심사 : 2014.06.12
  • 발행 : 2014.06.30

초록

본 연구는 휘진성 형광체를 이용하여 디지털 의료영상시스템의 환경에서 산란선에 의한 영상 특성을 연구하였다. 아크릴 팬텀을 사용하여 관전압 (50 kVp부터 120 kVp까지), 조사야($4{\times}4cm^2$부터 $26{\times}26cm^2$까지), 팬텀의 두께 (1 cm부터 25 cm까지)를 각각 변화시켜 실험을 실시하였다. 실험 방법은 영상을 ImageJ와 특성곡선을 사용하여 분석하였다. 관전압은 50 kVp ~ 70 kVp에서는 관전압이 증가하면서 일차선에 대한 산란선의 비율도 증가하지만, 80 kVp부터는 일정한 비율을 나타내었다. 조사야가 증가함에 따라 일차선에 대한 산란선의 비율은 증가한다. 팬텀 두께가 증가함에 따라 산란선이 증가한다.

The purpose of this study is evaluated scatter radiation in digital radiological condition by using photo-stimulated luminescence (BaFBr:$Eu^{2+}$). Experiment condition changed kVp (from 50 kVp to 120 kVp), filed size (from $4{\times}4cm^2$ to $26{\times}26cm^2$) and phantom thickness (from 1 cm to 15 cm). This method was analysed ImageJ and characteristic curve of CR. This results was scatter radiation to primary radiation ratio increased from 50 kVp to 70 kVp, and it was fixed at over 80 kVp. The scatter radiation to primary radiation ratio are increased according to increasing the ratio of field size. Scatter radiation is also increased by increasing the phantom thickness.

키워드

참고문헌

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