Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Development of Qualitative Evaluation of Medical Radiation Protective Apron

의료 방사선 방호용 앞치마의 정성적 평가법 개발

  • Lim, Hui-Gyeom (Department of Radiological Science, Kangwon National University) ;
  • Kim, Sang-Hyun (Department of Radiological Science, Shinhan University) ;
  • Kim, Tae-Hyung (Department of Radiological Science, Kangwon National University) ;
  • So, Woon Young (Department of Radiological Science, Kangwon National University) ;
  • Lee, Tae Hui (Department of Radiology, Wonju Medical Center) ;
  • Kim, Seung Chul (Institute of Health Science, Korea University) ;
  • Kim, Jin-Tae (Materials Research Institute, Truabutment Korea Co., Ltd)
  • 임희겸 (강원대학교 방사선학과) ;
  • 김상현 (신한대학교 방사선학과) ;
  • 김태형 (강원대학교 방사선학과) ;
  • 소운영 (강원대학교 방사선학과) ;
  • 이태희 (원주의료원 영상의학과) ;
  • 김승철 (고려대학교 보건과학연구소) ;
  • 김진태 ((주)트루어버트먼트코리아 재료연구소)
  • Received : 2017.09.07
  • Accepted : 2017.09.20
  • Published : 2017.09.30
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Abstract

This study proposes effective quality control and maintenance method by developing a new qualitative evaluation method of apron for medical radiation protection. As an experimental material, one of 0.45 mm lead and 100 of 0.45 mm Pb aprons were used and irradiated under the conditions of a tube voltage of 75 kVp and a tube current of 12.5 mAs to obtain an image. and using the Image J program, PSNR values were compared and analyzed. The results showed that there were 40 aprons (less than 11dB), 55 aprons (less than 11dB, less than 30dB), and 5 aprons (30dB or more). In addition, the dose showed a normal distribution for the apron, and 5 aprons with PSNR less than 11dB and 30dB or more were selected and divided into 8 zones, and these groups were statistically significant.

의료방사선 방호용 앞치마의 새로운 정성적인 평가방법을 개발하여 효과적인 정도관리 및 보수 관리법을 제시하고자 한다. 임상에서 사용되고 있는 0.45 mm Pb 앞치마 100개를 대상으로 관전압 75 kVp, 관전류 12.5 mAs의 방사선 조사조건으로 영상을 획득하였고, 동일한 조건으로 0.45 mm 납판을 대상으로 비교하였다. 획득된 영상은 Image J 프로그램을 이용하여 최대 신호 대 잡음 비(Pick Signal-to-Noise Ratio; PSNR) 값을 비교하였다. PSNR은 납판의 이미지와 상이한 앞치마(11dB 미만)는 40개, 유사한 앞치마(11dB 이상, 30dB 미만)는 55개, 거의 동일한(30dB 이상) 앞치마는 5개였다. 또한 선량은 앞치마에 대해서 정규분포를 나타냈으며, PSNR이 11dB 미만, 30dB 이상인 앞치마를 각 5개씩 선정한 후 8구역으로 나누어 비교분석한 결과 두 그룹은 통계적으로 유의하였다. 결론적으로, Image J 프로그램을 통해 획득한 PSNR 값은 앞치마의 정도관리 및 정기적인 성능평가가 가능한 정도관리 및 보수 관리법으로 적용 가능할 것으로 판단된다.

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