摘要
在通用的CT成像系统中,由于面阵探测器像元之间无光隔,成像过程相对线阵探测器而言系统散射影响大,动态范围小,成像指标远低于线阵探测器.采用大探测器方法重组像元,用亚像素高分辨率方法重组和补偿数据,弥补了面阵探测器在动态范围的不足,同时充分利用了面阵的高空间分辨率,得到了较好的CT重建结果.
In general CT imaging systems, due to no light isolation among the plxels of flat-panel detectors, more dispersion, less dynamic range and lower imaging parameters consist in imaging process compared with linear detectors. Big-size detectors is adopted to recombine the pixels, and recompose and compensate data by sub-pixel high-resolution approach. The method makes up the deficiency of dynamic range of flat panel detectors, and better CT reconstructed results can be obtained due to high space resolution of the flat panel.
出处
《中北大学学报（自然科学版）》
EI
CAS
2007年第6期541-545,共5页
Journal of North University of China(Natural Science Edition)
基金
国家自然科学基金资助项目(60602041)
山西省青年科学基金资助项目(2006021018)
关键词
工业CT
检测分辨率
面阵探测器
亚像素重建
industrial CT
detection resolution
flat panel detector
sub-pixel reconstruction
