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Proceedings Paper

A new approach for CT image reconstruction with asymmetric configuration
Author(s): Lifeng Yu; Xiaochuan Pan; Charles A. Pelizzari; Patrick J. La Riviere; Tin-Su Pan
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Paper Abstract

We developed a novel algorithm for image reconstruction from fan-beam data acquired with asymmetric flat-panel detectors. This new algorithm can improve the noise properties of the widely used fan-beam filtered-backprojection (FFBP) algorithm by eliminating the spatially-variant weighting factor while retaining FFBP's favorable resolution properties. Quantitative results verify the theoretical prediction of the improved noise properties. These improved noise properties can be translated into a reduction of radiation dose. The new algorithm is particularly robust and useful when applied to CT systems with large field of measurement (FOM) and/or relatively small focal lengths.

Paper Details

Date Published: 15 May 2003
PDF: 7 pages
Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); doi: 10.1117/12.483537
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)
Patrick J. La Riviere, Univ. of Chicago (United States)
Tin-Su Pan, GE Medical Systems (United States)

Published in SPIE Proceedings Vol. 5032:
Medical Imaging 2003: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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