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arXiv · 2101.01886

A New Weighting Scheme for Fan-beam and Circle Cone-beam CT Reconstructions

Wei Wang·Xiang-Gen Xia·Chuanjiang He·Zemin Ren·Jian Lu·Tianfu Wang·Baiying Lei
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Abstract

In this paper, we first present an arc based algorithm for fan-beam computed tomography (CT) reconstruction via applying Katsevich's helical CT formula to 2D fan-beam CT reconstruction. Then, we propose a new weighting function to deal with the redundant projection data. By extending the weighted arc based fan-beam algorithm to circle cone-beam geometry, we also obtain a new FDK-similar algorithm for circle cone-beam CT reconstruction. Experiments show that our methods can obtain higher PSNR and SSIM compared to the Parker-weighted conventional fan-beam algorithm and the FDK algorithm for super-short-scan trajectories.

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Wei Wang, Xiang-Gen Xia, Chuanjiang He, Zemin Ren, Jian Lu, Tianfu Wang, Baiying Lei. 2021-01-06. A New Weighting Scheme for Fan-beam and Circle Cone-beam CT Reconstructions. https://arxiv.org/abs/2101.01886

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