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Proceedings Paper

Self-calibration for a multi-segment straight-line trajectory CT using invariant moment
Author(s): Xiyun Li; Zhiqiang Chen; Xiaolei Jiang; Yuxiang Xing
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Paper Abstract

Multi-segment straight-line trajectory computed tomography (CT) requires accurate movement between each segment trajectories. In industrial applications for large objects, it is difficult and very cost-expensive for the mechanical and control system to ensure the accurate movement during the rotation process between two segment trajectories. Hence, precisely measuring the movement would be an alternative choice to acquire an exact reconstruction. In this work, we proposes a new method to measure the movement by using invariant moment of attenuation distribution images. Its accuracy improves as the number of projection data increases. The method is validated by both numerical and practical experiments. Reasonable CT reconstructions are obtained for a two-segment linear trajectory CT with coarse mechanical movement control modeled in our experiments.

Paper Details

Date Published: 17 October 2012
PDF: 8 pages
Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 85061K (17 October 2012); doi: 10.1117/12.928355
Show Author Affiliations
Xiyun Li, Tsinghua Univ. (China)
Zhiqiang Chen, Tsinghua Univ. (China)
Xiaolei Jiang, Tsinghua Univ. (China)
Yuxiang Xing, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 8506:
Developments in X-Ray Tomography VIII
Stuart R. Stock, Editor(s)

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