Work

Exact BPF and FBP algorithms for nonstandard saddle curves

Year: 2005

Type: article

Abstract: A hot topic in cone-beam CT research is exact cone-beam reconstruction from a general scanning trajectory. Particularly, a nonstandard saddle curve attracts attention, as this construct allows the continuous periodic scanning of a volume-of-interest (VOI). Here we evaluate two algorithms for reconstruction from data collected along a nonstandard saddle curve, which are in the filtered backprojection (FBP) and backprojection filtration (BPF) formats, respectively. Both the algorithms are implemented in a chord-based coordinate system. Then, a rebinning procedure is utilized to transform the reconstructed results into the natural coordinate system. The simulation results demonstrate that the FBP algorithm produces better image quality than the BPF algorithm, while both the algorithms exhibit similar noise characteristics.

Source: Medical Physics

DOI: 10.1118/1.2074207

Authors: Hengyong Yu, Shiying Zhao, Yangbo Ye, Ge Wang

Institution: University of Iowa

Language: English

Topic: Medical Imaging Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: bronze

Funders: National Institutes of Health, National Institute of Biomedical Imaging and Bioengineering

Awards: Cone-Beam Methods for Dynamic Volumetric X-Ray CT, G3419805727, G4532454364, G5586313727, G9000313428