Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Enhancement of Image Quality Using Detector Filter

검출기 필터를 이용한 화질의 향상

  • Lim, Jong-Nam (Department of Radiological Science, The Graduate School of Catholic University of Daegu) ;
  • Kim, Hyung-Tae (Department of Radiological Science, The Graduate School of Catholic University of Daegu) ;
  • Kim, Min-Hye (Department of Radiological Science, The Graduate School of Catholic University of Daegu) ;
  • Chon, Kwon Su (Department of Radiological Science, The Graduate School of Catholic University of Daegu)
  • 임종남 (대구가톨릭대학교 일반대학원 방사선학과) ;
  • 김형태 (대구가톨릭대학교 일반대학원 방사선학과) ;
  • 김민혜 (대구가톨릭대학교 일반대학원 방사선학과) ;
  • 천권수 (대구가톨릭대학교 일반대학원 방사선학과)
  • Received : 2016.08.21
  • Accepted : 2016.10.30
  • Published : 2016.10.31
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Abstract

Radiation dose to patient is unavoidable when diagnosis is carried out using X-ray. Radiation diagnosis using dual energy X-ray was examined to verify the possibility of medical applications by SNR and image scoring. The dual energy X-ray was realized by combining together two image plates and filter of 0.5 mm thick Cu or Al. Under one X-ray exposure, contrast enhanced image was obtained using two images of image plates. The enhanced image showed higher SNR and image score compared to the first image which was the image recorded with the first image plate. The dual energy X-ray technique would be a very useful method for obtaining higher SNR image and for realizing very low dose, and could be applied to medical applications.

방사선 검사로 환자의 병을 진단하기 위해서는 방사선 피폭이 따르게 된다. 최소한의 피폭으로 병변을 진단하는 일반촬영에 이중 엑스선 에너지 기법의 임상적용 가능성을 SNR 및 화질 점수화의 지표로 조사하였다. 이중 엑스선 에너지 기법은 검출기로 사용되는 두 개의 Image Plate 사이에 0.5 mm 두께의 Cu와 Al 필터를 추가함으로써 구현하였다. 한 번의 엑스선 조사로 획득된 두 IP 영상을 Subtraction 및 Enhance Contrast 기법을 적용하여 획득하였다. Enhance 영상은 첫 번째 IP에서 획득한 First 영상보다 SNR이 우수한 것으로 측정되었다. 이 일반촬영의 이중 엑스선 에너지 기법은 피폭선량을 줄이면서 영상의 품질을 높일 수 있는 방법으로 임상에서 매우 유용하게 적용될 수 있을 것이다.

Keywords

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