Work

A backprojection-filtration algorithm for nonstandard spiral cone-beam CT with ann-PI-window

Year: 2005

Type: article

Abstract: For applications in bolus-chasing computed tomography (CT) angiography and electron-beam micro-CT, the backprojection-filtration (BPF) formula developed by Zou and Pan was recently generalized by Ye et al to reconstruct images from cone-beam data collected along a rather flexible scanning locus, including a nonstandard spiral. A major implication of the generalized BPF formula is that it can be applied for n-PI-window-based reconstruction in the nonstandard spiral scanning case. In this paper, we design an n-PI-window-based BPF algorithm, and report the numerical simulation results with the 3D Shepp-Logan phantom and Defrise disk phantom. The proposed BPF algorithm consists of three steps: cone-beam data differentiation, weighted backprojection and inverse Hilbert filtration. Our simulated results demonstrate the feasibility and merits of the proposed algorithm.

Source: Physics in Medicine and Biology

DOI: 10.1088/0031-9155/50/9/012

Authors: Hengyong Yu, Yangbo Ye, Shiying Zhao, 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