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A Comparative Study of Image Quality and Radiation Dose according to Variable Added Filter and Radiation Exposure in Diagnostic X-Ray Radiography

진단용 X-선 촬영시 부가 필터 및 노출의 변화에 따른 피폭선량 및 영상 화질 비교 연구

  • Choi, Nam-Gil (Department of Radiology, Dongshin University) ;
  • Seong, Ho-Jin (Department of Radiology, Chonnam National University Hospital) ;
  • Jeon, Joo-Seop (Department of Radiology, Chonnam National University Hospital) ;
  • Kim, Youn-Hyun (Department of Radiology, Chonnam National University Hospital) ;
  • Seong, Dong-Ook (Department of Diagnostic Radiology, Kyung Hee University Medical School)
  • 최남길 (동신대학교 방사선학과) ;
  • 성호진 (전남대학교병원 영상의학과) ;
  • 전주섭 (전남대학교병원 영상의학과) ;
  • 김윤현 (전남대학교병원 영상의학과) ;
  • 성동욱 (경희대학교 의과대학 영상의학교실)
  • Received : 2011.11.18
  • Accepted : 2012.01.14
  • Published : 2012.03.30

Abstract

To know which parameters were acceptable for achieving lowest radiation exposure to the patients and highest image quality at the diagnostic X-ray radiography, we measured the patient radiation dose and image quality in transmitted PACS (Picture Archiving and Communication System) at variable combinations of the added filters. As a result, the Dose Area Product (DAP: $mGy{\cdot}cm^2$) and Entrance Surface Doses (ESDs: $mGy$) was lowest at 1 mmAl + 0.2 mmCu and highest at 0 mmAl. The histogram of the image quality by transmitted PACS was not significantly different at variable combinations of exposure parameters on the MATLAB. In conclusion, this study can be helpful for expecting radiation dose-exposure and control exposure parameters for the diagnostic X-ray radiography.

본 연구는 진단용 X-선 촬영에서 부가필터 두께에 따라 피폭 선량 및 의료영상저장전송시스템에 저장된 영상을 비교 평가하여 환자에게 가장 적은 방사선 피폭을 주면서 진단에 적절한 영상을 얻을 수 있는 촬영 조건을 알아보고자 하였다. 그 결과 면적선량($mGy{\cdot}cm^2$)과 입사표면선량($mGy$)은 1 mmAl+0.2 mmCu의 부가필터에서 가장 낮은 피폭 선량값을, 그리고 0 mmAl (No Filter)에서 가장 높은 피폭 선량 값을 보였다. 그러나 의료영상저장전송시스템으로 전송된 영상을 수치 해석 소프트웨어(MATLAB)로 구현한 히스토그램 결과 영상의 질에는 크게 영향을 미치지 않았다. 따라서 진단용 X-선 촬영 장치를 이용한 영상의학적 검사에서 영상의 질에 영향을 미치지 않고 피폭선량을 경감할 수 있는 최적의 부가필터를 사용함으로서 환자의 피폭 선량을 예측하고 검사 조건을 조절하는 데 있어 유용하게 이용될 수 있을 것으로 판단되었다.

Keywords

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