Image reconstruction for the circle-and-arc trajectory

    Authors

    A. Katsevich

    Comments

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    Abbreviated Journal Title

    Phys. Med. Biol.

    Keywords

    CONE-BEAM CT; FILTERED BACKPROJECTION; INVERSION ALGORITHM; COMPUTED-TOMOGRAPHY; PI-LINES; ACQUISITION; GEOMETRY; Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging

    Abstract

    Proposed is an exact shift-invariant filtered backprojection algorithm for the circle-and-arc trajectory. The algorithm has several important features. First, it allows for the circle to be incomplete. Second, axial truncation of the cone beam data is allowed. Third, the length of the arc is determined only by the region of interest and is independent of the size of the entire object. The algorithm is quite flexible and can be used for even more general trajectories that consist of several circular segments and arcs. The algorithm applies also in the case when the circle (or, circles) is complete. A numerical experiment with the clock phantom demonstrated good image quality.

    Journal Title

    Physics in Medicine and Biology

    Volume

    50

    Issue/Number

    10

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    2249

    Last Page

    2265

    WOS Identifier

    WOS:000229866100005

    ISSN

    0031-9155

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