Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
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Dose and Image Quality Analysis According to The Type of Composite Additional Filter

복합 부가필터 종류에 따른 선량 및 화질 분석

  • Myoung, Noh-Beom (Department of Radiology, Chungnam National University Sejong Hospital) ;
  • Im, So-Yeon (Department of Radiation Oncology, Gangnam Severance Hospital) ;
  • Yoo, Se-Jong (Department of Radiology, Daejeon Health Institute of Technology) ;
  • Kim, Seong-Ho (Department of Radiology, Daejeon Health Institute of Technology) ;
  • Jeon, Min-Cheol (Department of Radiology, Daejeon Health Institute of Technology)
  • 명노범 (세종충남대학교병원 영상의학과) ;
  • 임소연 (강남세브란스병원 방사선종양학과) ;
  • 유세종 (대전보건대학교 방사선(학)과) ;
  • 김성호 (대전보건대학교 방사선(학)과) ;
  • 전민철 (대전보건대학교 방사선(학)과)
  • Received : 2020.07.30
  • Accepted : 2020.10.20
  • Published : 2020.10.28
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Abstract

In this study, four types of composite added filtration (aluminum, nickel, copper, and zinc) were combined for each thickness to evaluate dose reduction and optimal images due to X-ray attenuation. To evaluate dose and image quality. X-ray generators, Dose Area Product(DAP) and ICY programs with RQR9 standard quality were used. In the image quality evaluation element (PSNR, RMSE, SSIM), only images with PSNR value of 30 dB or more were analyzed. As a result, the best combination in dose evaluation was 3 mmAl + 0.6 mmNi (0.16µGy㎡), and the best filter in image quality evaluation was 0.9 mmAl (PSNR 34.24dB, RMSE 79.52, SSIM 0.24). In this study, the dose aspect and the image quality aspect are mentioned, So it is considered that further studies on patient's exposure dose and optimal image will be needed in the future.

본 연구에서는 복합 부가필터(Composite added filtration) 4가지 종류(알루미늄, 니켈, 구리, 아연)를 두께별로 조합하여 X-선 감약에 따른 선량감소와 최적의 영상을 평가하였다. 선량과 화질을 평가는 RQR9 표준 선질을 설정한 X선 발생장치, 면적선량계 그리고 ICY 프로그램이 사용되었다. 화질평가 항목(PSNR, RMSE, SSIM)에서는 PSNR값이 30 dB 이상이 되는 영상들만을 분석하였다. 그 결과 선량평가에서 가장 우수한 조합은 3 mmAl + 0.6 mmNi(0.16µGy㎡)이었고, 화질평가에서 가장 우수한 필터는 0.9 mmAl (PSNR 34.24dB, RMSE 79.52, SSIM 0.24)이었다. 본 연구에서는 선량적 측면과 화질적 측면이 언급되었기에 향후 환자의 피폭선량과 최적의 영상에 대한 더 많은 연구가 필요할 것으로 사료된다.

Keywords

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