Tomographic mesh generation for OSEM reconstruction of SPECT images

Yao Lu; Bo Yu; Levon Vogelsang; Andrzej Krol; Yuesheng Xu; Xiaofei Hu; David Feiglin

doi:10.1117/12.813866

13 March 2009 Tomographic mesh generation for OSEM reconstruction of SPECT images

Yao Lu, Bo Yu, Levon Vogelsang, Andrzej Krol, Yuesheng Xu, Xiaofei Hu, David Feiglin

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 725854 (2009) https://doi.org/10.1117/12.813866
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

To improve quality of OSEM SPECT reconstruction in the mesh domain, we implemented an adaptive mesh generation method that produces tomographic mesh consisting of triangular elements with size and density commensurate with geometric detail of the objects. Node density and element size change smoothly as a function of distance from the edges and edge curvature without creation of 'bad' elements. Tomographic performance of mesh-based OSEM reconstruction is controlled by the tomographic mesh structure, i.e. node density distribution, which in turn is ruled by the number of key points on the boundaries. A greedy algorithm is used to influence the distribution of nodes on the boundaries. The relationship between tomographic mesh properties and OSEM reconstruction quality has been investigated. We conclude that by selecting adequate number of key points, one can produce a tomographic mesh with lowest number of nodes that is sufficient to provide desired quality of reconstructed images, appropriate for the imaging system properties.

Citation Download Citation

Yao Lu, Bo Yu, Levon Vogelsang, Andrzej Krol, Yuesheng Xu, Xiaofei Hu, and David Feiglin "Tomographic mesh generation for OSEM reconstruction of SPECT images", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725854 (13 March 2009); https://doi.org/10.1117/12.813866

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