Conference proceeding
Katsevich-type algorithims for variable radius spiral cone-beam CT
Proceedings of SPIE, Vol.5535(1), pp.550-557
Developments in X-Ray Tomography IV
10/26/2004
DOI: 10.1117/12.559300
Abstract
To solve the long object problem, an exact and efficient algorithm has been recently developed by Katsevich. While the Katsevich algorithm only works with standard helical cone-beam scanning, there is an important need for nonstandard spiral cone-beam scanning. Specifically, we need a scanning spiral of variable radius for our newly proposed electron-beam CT/micro-CT prototype. In this paper, for variable radius spiral cone-beam CT we construct two Katsevich-type cone-beam reconstruction algorithms in the filtered backprojection (FBP) and backprojected filtration (BPF) formats, respectively. The FBP algorithm is developed based on the standard Katsevich algorithm, and consists of four steps: data differentiation, PI-line determination, slant filtration and weighted backprojection. The BPF algorithm is designed based on the scheme by Zou and Pan, and also consists four steps: data differentiation, PI-line determination, weighted backprojection and inverse Hilbert transform. Numerical experiments are conducted with mathematical phantoms
Details
- Title: Subtitle
- Katsevich-type algorithims for variable radius spiral cone-beam CT
- Creators
- Hengyong Yu - Hangzhou Dianzi UniversityYangbo Ye - University of IowaGe Wang - University of Iowa
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of SPIE, Vol.5535(1), pp.550-557
- Conference
- Developments in X-Ray Tomography IV
- DOI
- 10.1117/12.559300
- ISSN
- 0277-786X
- Language
- English
- Date published
- 10/26/2004
- Academic Unit
- Mathematics
- Record Identifier
- 9984240760802771
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