Fourier-based forward and back-projectors in iterative fan-beam tomographic image reconstruction.
other · Level V
Where this comes from
- Record sourced from PubMed, PMID 16689262.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Fourier-based forward and back-projection methods can reduce computation in iterative tomographic image reconstruction. Recently, an optimized nonuniform fast Fourier transform (NUFFT) approach was shown to yield accurate parallel-beam projections. In this paper, we extend the NUFFT approach to describe an O (N2 log N) projector/backprojector pair for fan-beam transmission tomography. Simulations and experiments with real CT data show that fan-beam Fourier-based forward and back-projection methods can reduce computation for iterative reconstruction while still providing accuracy comparable to their O (N3) space-based counterparts.
Medical subject headings
- Algorithms
- Imaging, Three-Dimensional
- Radiographic Image Enhancement
- Radiographic Image Interpretation, Computer-Assisted
- Tomography, X-Ray Computed