A filtering algorithm based on SPECT lesion detectability potential

被引:0
作者
Kim, JH [1 ]
Kim, KI [1 ]
机构
[1] POSTECH, Informat Res Lab, Pohang 790784, South Korea
来源
1997 IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD, VOLS 1 & 2 | 1998年
关键词
D O I
暂无
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
This paper describes an effective filtering algorithm which employs a priori information of SPECT lesion detectability potential for the filtering of degraded projection image prior to backprojection. For a given set of physical conditions, we determined m minimum detectable lesion sizes (MDLSs) from SPECT lesion detectability contrast-detail curves, uniformly-choosing m lesion contrasts between 0.0 and 1.0. Related to our previous work, an optimal estimate of given projection image was attempted as a weighted combination of the subimages from the m optimal filters whose design is focused on maximizing the local S/N ratios of the determined MDLS-lesions, and the weighting on each subimage was controlled by the difference between the subimage and a maximum-resolution-recovered projection image. The results of our simulation study showed the adaptive effect of this algorithm and its good performance in effectively reducing image noise and preserving/enhancing lesion structures.
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页码:1706 / 1710
页数:5
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