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Proceedings Paper

Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths
Author(s): Lifeng Yu; Xiaochuan Pan; Charles A. Pelizzari
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Paper Abstract

We propose a generalized algorithm for image reconstruction from data acquired in an asymmetric fan-beam configuration with a spatially varying focal length. This algorithm is an extension of our previous algorithm for fan-beam computed tomography (CT) that involves a shift-variant filtering. As compared to the existing algorithms, the proposed algorithm involves no additional explicit interpolation and eliminates the spatially-variant weighting factor. Therefore, it retains the spatial resolution and is less susceptible to data noise. We performed computer-simulation studies to validate and evaluate the proposed algorithm, and quantitative results demonstrate that the proposed algorithm possesses desirable noise and numerical properties.

Paper Details

Date Published: 12 May 2004
PDF: 7 pages
Proc. SPIE 5370, Medical Imaging 2004: Image Processing, (12 May 2004); doi: 10.1117/12.535326
Show Author Affiliations
Lifeng Yu, Univ. of Chicago (United States)
Xiaochuan Pan, Univ. of Chicago (United States)
Charles A. Pelizzari, Univ. of Chicago (United States)


Published in SPIE Proceedings Vol. 5370:
Medical Imaging 2004: Image Processing
J. Michael Fitzpatrick; Milan Sonka, Editor(s)

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