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Proceedings Paper

In-plane motion estimation for artifact reduction in fan-beam CT
Author(s): Hengyong Yu; Ge Wang
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Paper Abstract

It is well known that a rigid in-plane motion can be decomposed into a translation and a rotation around an origin. Based on our previous work [1], we first extend the Helgason-Ludwig consistency condition (HLCC) to cover a general rigid motion in fan-beam geometry. Then, we model the general motion by several parameters, and develop a multi-scale iterative scheme for estimation of the in-plane motion parameters. This scheme determines the motion parameters by numerically minimizing an objective function constructed based on the HLCC. After the motion parameters are estimated, image reconstruction can be performed to compensate for the motion effects. Finally, we implement the algorithm in Matlab and C++, and evaluate its performance in numerical simulations.

Paper Details

Date Published: 7 September 2006
PDF: 14 pages
Proc. SPIE 6318, Developments in X-Ray Tomography V, 63181J (7 September 2006); doi: 10.1117/12.677357
Show Author Affiliations
Hengyong Yu, Univ. of Iowa (United States)
Ge Wang, Univ. of Iowa (United States)

Published in SPIE Proceedings Vol. 6318:
Developments in X-Ray Tomography V
Ulrich Bonse, Editor(s)

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