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Proceedings Paper

Filtering path variable FDK (v-FDK) reconstruction algorithm for circular cone-beam CT
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Paper Abstract

The FDK algorithm has played an important role in both biomedicine and industry because of its celerity and simplicity for the reconstruction of CT images. However, artifacts and attenuation may occur in FDK reconstruction under large cone angle with circular trajectory owing to the insufficient data. In this paper, a factor k is introduced to change the projected surface, based on the idea of rebinning algorithm. In that case, the path of filtering was arbitrarily changed and a unified pre-weighting formula was presented, which consequently enable the filtering path variable FDK (v-FDK) to be smoothly converted to P- FDK and T-FDK by tuning the k factor. Numerical simulations demonstrated our proposed algorithm an effective method for improving the reconstruction accuracy especially in the case of large cone-angles. On top of that, an optimal k value was found which can be used to obtain a reconstructed image with better quality than the image obtained by P-FDK and T-FDK.

Paper Details

Date Published: 12 March 2020
PDF: 13 pages
Proc. SPIE 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 114410J (12 March 2020); doi: 10.1117/12.2551371
Show Author Affiliations
Chen Wang, Institute of Fluid Physics (China)
Bo-zhong Tan, Institute of Fluid Physics (China)
Qing-guo Yang, Institute of Fluid Physics (China)
Ze-ren Li, Institute of Fluid Physics (China)


Published in SPIE Proceedings Vol. 11441:
2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang; Zhiming Huang, Editor(s)

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