In-plane motion estimation for artifact reduction in fan-beam CT

Hengyong Yu; Ge Wang

doi:10.1117/12.677357

7 September 2006 In-plane motion estimation for artifact reduction in fan-beam CT

Hengyong Yu, Ge Wang

Proceedings Volume 6318, Developments in X-Ray Tomography V; 63181J (2006) https://doi.org/10.1117/12.677357
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Hengyong Yu and Ge Wang "In-plane motion estimation for artifact reduction in fan-beam CT", Proc. SPIE 6318, Developments in X-Ray Tomography V, 63181J (7 September 2006); https://doi.org/10.1117/12.677357

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