Application of a spatially variant system model for 3-D whole-body pet image reconstruction

被引:11
作者
Alessio, Adam M. [1 ]
Kinahan, Paul E. [1 ]
机构
[1] Univ Washington, Dept Radiol, Seattle, WA 98195 USA
来源
2008 IEEE INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING: FROM NANO TO MACRO, VOLS 1-4 | 2008年
关键词
fully 3-D reconstruction; system modeling; point spread function; PET;
D O I
10.1109/ISBI.2008.4541246
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Accurate system modeling in tomographic image reconstruction has been shown to reduce the spatial variance of resolution and improve quantitative accuracy. System modeling can be improved through analytic calculations, Monte Carlo simulations, and physical measurements. This work presents a novel measured system model and incorporates this model into a fully 3-D statistical reconstruction method. Empirical testing of the resolution versus noise benefits reveal a modest improvement in spatial resolution at matched image noise levels. Convergence analysis demonstrate improved resolution and contrast versus noise properties can be achieved with the proposed method with similar computation time as the conventional approach. Images reconstructed with the proposed model contain correlated noise structures which are difficult to characterize with accepted NEMA noise metrics.
引用
收藏
页码:1315 / 1318
页数:4
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