Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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A Study on the Optimal Design for the reconstruction Filter in Single Photon Emission Computed Tomography (SPECT)

단일광자방출 전산화 단층촬영상에서 재구성 필터의 최적설계에 관한 연구

  • 김정희 (포항공과대학교 정보통신연구소) ;
  • 김광익 (포항공과대학교 수학과)
  • Published : 1997.06.01
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Abstract

This paper presents an optimal design for the SPECT reconstruction filter, based on a physical limit of SPECT lesion detection capability. To increase the performance of the filter on lesion detectability, the filter design was focused on increasing the local SyW ratio of a threshold lesion, that was determined by minimum detectable lesion size (MDU) from SPECT lesion detectabllity contrast-detail curve. The proposed filter showed flexible window characteristics of resolution recovery and noise smoothing for MDLSs in the resolution-limited and photon-limited regions, respectively, compennting for the relative impact of the main limitation factors on threshold detectability. The simulated results showed good adaptability of the proposed filter to the changes in physical parameters of photon counts, object contrast, and detector system resolution.

Keywords

References

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