Optimized Reconstruction Algorithm for Helical CT With Fractional Pitch Between 1PI and 3PI

    Authors

    A. Katsevich; A. A. Zamyatin;M. D. Silver

    Abbreviated Journal Title

    IEEE Trans. Med. Imaging

    Keywords

    Biomedical imaging; cone beam computed tomography (CT); image; reconstruction; X-ray tomography; CONE-BEAM CT; INVERSION ALGORITHM; SPLIT METHOD; TOMOGRAPHY; Computer Science, Interdisciplinary Applications; Engineering, ; Biomedical; Engineering, Electrical & Electronic; Imaging Science &; Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging

    Abstract

    We propose an approximate approach to use redundant data outside the 1PI window within the exact Katsevich reconstruction framework. The proposed algorithm allows a flexible selection of the helical pitch, which is useful for clinical applications. Our idea is an extension of the one proposed by Kohler, Bontus, and Koken (2006). It is based on optimizing the contribution weights of convolution families used in exact Katsevich 3PI algorithms, so that the total weight of each Radon plane is as close to 1 as possible. Optimization is based on solving a least squares problem subject to linear constrains. Numerical evaluation shows good noise and artifact reduction properties of the proposed algorithm.

    Journal Title

    Ieee Transactions on Medical Imaging

    Volume

    28

    Issue/Number

    7

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    982

    Last Page

    990

    WOS Identifier

    WOS:000267698100002

    ISSN

    0278-0062

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