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A New Weighting Scheme for Fan-beam and Circle Cone-beam CT Reconstructions
- Publication Year :
- 2021
-
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.
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2101.01886
- Document Type :
- Working Paper