Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

A new algorithm for minimization of metal artifact made on CT by pedicle screws

Pedicle screws에 의해 CT에 생성되는 metal artifact를 최소화하는 알고리즘 개발

  • Lee, J.B. (Dept. of Industrial Engineering, College of Engineering, Seoul National Univ.) ;
  • Yeom, J.S. (Dept. of Orthopedics, College of Medicine, Seoul National Univ.) ;
  • Kim, N.K. (BIT Computer, Co., Ltd.) ;
  • Lee, D.H. (Dept. of Biomedical Engineering, Seoul National Univ.) ;
  • Kim, J.H. (Dept. of Radiology, College of Medicine, Seoul National Univ.) ;
  • Kim, Y. (Dept. of Industrial Engineering, College of Engineering, Seoul National Univ.)
  • 이제범 (서울대학교 산업공학과) ;
  • 염진섭 (서울대학교 의과대학 정형외과) ;
  • 김남국 ((주)비트컴퓨터) ;
  • 이동혁 (서울대학교 의공학과) ;
  • 김종효 (서울대학교 의과대학 방사선학교실) ;
  • 김영호 (서울대학교 산업공학과)
  • Published : 1998.11.20
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Abstract

A new algorithm is developed that can reduce the metal artifact on CT caused by pedicle screws. Metal artifact has been recognized as a major problem in precise reading of CT images. In particular, spine surgeons have been bothered with the artifact appearing on CT taken after pedicle screw insertion. To reduce the artifact, our new algorithm first finds the center line from CT images, and then overlays an exact size screw image on the CT. The exact screw is obtained from an actual design specifications of screw, and the CT images are processed to maximize bone margins while minimizing screw images through adjusting the window width and level. 실험 결과 단순한 Window W/L 조절로는 해결되지 않는군요. This algorithm provides spine surgeons with more accurate CT images and thus better interpretation of CT to ascertain the success or failure of pedicle screw insertion.

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