A new approach for CT image reconstruction with asymmetric configuration

Lifeng Yu; Xiaochuan Pan; Charles A. Pelizzari; Patrick J. La Riviere; Tin-Su Pan

doi:10.1117/12.483537

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15 May 2003 A new approach for CT image reconstruction with asymmetric configuration

Lifeng Yu, Xiaochuan Pan, Charles A. Pelizzari, Patrick J. La Riviere, Tin-Su Pan

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Proceedings Volume 5032, Medical Imaging 2003: Image Processing; (2003) https://doi.org/10.1117/12.483537
Event: Medical Imaging 2003, 2003, San Diego, California, United States

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.

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Lifeng Yu, Xiaochuan Pan, Charles A. Pelizzari, Patrick J. La Riviere, and Tin-Su Pan "A new approach for CT image reconstruction with asymmetric configuration", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); https://doi.org/10.1117/12.483537

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