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28 February 2017 Projection matrix acquisition for cone-beam computed tomography iterative reconstruction
Fuqiang Yang, Dinghua Zhang, Kuidong Huang, Wenlong Shi, Caixin Zhang, Zongzhao Gao
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Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102560J (2017) https://doi.org/10.1117/12.2269014
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China
Abstract
Projection matrix is an essential and time-consuming part in computed tomography (CT) iterative reconstruction. In this article a novel calculation algorithm of three-dimensional (3D) projection matrix is proposed to quickly acquire the matrix for cone-beam CT (CBCT). The CT data needed to be reconstructed is considered as consisting of the three orthogonal sets of equally spaced and parallel planes, rather than the individual voxels. After getting the intersections the rays with the surfaces of the voxels, the coordinate points and vertex is compared to obtain the index value that the ray traversed. Without considering ray-slope to voxel, it just need comparing the position of two points. Finally, the computer simulation is used to verify the effectiveness of the algorithm.
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Fuqiang Yang, Dinghua Zhang, Kuidong Huang, Wenlong Shi, Caixin Zhang, and Zongzhao Gao "Projection matrix acquisition for cone-beam computed tomography iterative reconstruction", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102560J (28 February 2017); https://doi.org/10.1117/12.2269014
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KEYWORDS
Computed tomography
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