Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Backprojection Filtering Method for Limited Angle Tomography

제한된 각도에서 단층영상 획득을 위한 역투사 후 필터링 방법

  • Cho, Min-Kook (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Ho-Kyung (School of Mechanical Engineering, Pusan National University) ;
  • Yin, Z-Hye (Computed Tomography System and Application Laboratory, GE Global Research Center) ;
  • Kim, Tae-Woo (Advanced Medical Engineering Laboratory, Value Added Technologies, Co., Ltd.)
  • 조민국 (부산대학교 기계공학부) ;
  • 김호경 (부산대학교 기계공학부) ;
  • 인지혜 (미국 뉴욕 GE 글로벌 연구센터 CT 시스템 및 응용 실험실) ;
  • 김태우 (㈜바텍 차세대 의료기술연구소)
  • Published : 2008.02.29
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Abstract

We describe a backprojection filtering method for limited angle tomography. In order to reduce blur artifacts originated from the out-of-planes and control high-frequency noise, we employed two band-limited window functions, and which were realized by Hann filters in this study. Based on the experimentally measured data, the performance of the developed method is demonstrated by comparing with the conventional shift-and-add and filtered backprojection methods. Application of the developed method to the dental imaging has a potential to be used for the preoperative evaluation of the jaw for dental implants with much reduced patient dose instead of the conventional dental computed tomography.

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References

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