A frequency domain based rigid motion artifact reduction algorithm

Hai Luo; Xiaojie Huang; Wenyu Pan; Heqin Zhou

doi:10.1117/12.832528

30 October 2009 A frequency domain based rigid motion artifact reduction algorithm

Hai Luo, Xiaojie Huang, Wenyu Pan, Heqin Zhou

Proceedings Volume 7497, MIPPR 2009: Medical Imaging, Parallel Processing of Images, and Optimization Techniques; 74972K (2009) https://doi.org/10.1117/12.832528
Event: Sixth International Symposium on Multispectral Image Processing and Pattern Recognition, 2009, Yichang, China

Abstract

During a CT scan, patients' conscious or unconscious motions would result in motion artifacts which undermine the image quality and hamper doctors' accurate diagnosis and therapy. It is desirable to develop a precise motion estimation and artifact reduction method in order to produce high-resolution images. Rigid motion can be decomposed into two components: translational motion and rotational motion. Since considering the rotation and translation simultaneously is very difficult, most former studies on motion artifact reduction ignore rotation. The extended HLCC based method considering the rotation and translation simultaneously relies on a searching algorithm which leads to expensive computing cost. Therefore, a novel method which does not rely on searching is desirable. In this paper, we focus on parallel-beam CT. We first propose a frequency domain based method to estimate rotational motion, which is not affected by translational motion. It realizes the separation of rotation estimation and translation estimation. Then we combine this method with the HLCC based method to construct a new method for general rigid motion called separative estimation and collective correction method. Furthermore, we present numerical simulation results to show the accuracy and robustness of our approach.

Citation Download Citation

Hai Luo, Xiaojie Huang, Wenyu Pan, and Heqin Zhou "A frequency domain based rigid motion artifact reduction algorithm", Proc. SPIE 7497, MIPPR 2009: Medical Imaging, Parallel Processing of Images, and Optimization Techniques, 74972K (30 October 2009); https://doi.org/10.1117/12.832528

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