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

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