Metal artifacts reduction in CT images through Euler’s elastica and curvature based sinogram inpainting

Jianwei Gu; Li Zhang; Guoqiang Yu; Yuxiang Xing; Zhiqiang Chen

doi:10.1117/12.650137

17 March 2006 Metal artifacts reduction in CT images through Euler's elastica and curvature based sinogram inpainting

Jianwei Gu, Li Zhang, Guoqiang Yu, Yuxiang Xing, Zhiqiang Chen

Proceedings Volume 6144, Medical Imaging 2006: Image Processing; 614465 (2006) https://doi.org/10.1117/12.650137
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Metal artifacts arise in CT images when X-rays traverse the high attenuating objects such as metal bodies. Portions of projection data become unavailable. In this paper, we present an Euler's elastica and curvature based sinogram inpainting (EECSI) algorithm for metal artifacts reduction, where "inpainting" is a synonym for "image interpolation". In EECSI, the unavailable data are regarded as occlusion and can be inpainted inside the inpainting domain based on elastica interpolants. Numerical simulations demonstrate that, compared to conventional interpolation methods, the algorithm proposed connects the unavailable projection region more smoothly and accurately, thus better reduces metal artifacts and more accurately reveals cross section structures, especially in the immediate neighborhood of the metallic objects.

Citation Download Citation

Jianwei Gu, Li Zhang, Guoqiang Yu, Yuxiang Xing, and Zhiqiang Chen "Metal artifacts reduction in CT images through Euler's elastica and curvature based sinogram inpainting", Proc. SPIE 6144, Medical Imaging 2006: Image Processing, 614465 (17 March 2006); https://doi.org/10.1117/12.650137

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