Analysis of an exact inversion algorithm for spiral cone-beam CT

    Authors

    A. Katsevich

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Phys. Med. Biol.

    Keywords

    LONG-OBJECT PROBLEM; TOMOGRAPHY; RECONSTRUCTION; Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging

    Abstract

    In this paper we continue studying a theoretically exact filtered backprojection inversion formula for cone beam spiral CT proposed earlier by the author. Our results show that if the phantom f is constant along the axial direction, the formula is equivalent to the 2D Radon transform inversion. Also, the inversion formula remains exact as spiral pitch goes to zero and in the limit becomes again the 2D Radon transform inversion formula. Finally, we show that according to the formula the processed cone beam projections should be backprojected using both the inverse distance squared law and the inverse distance law.

    Journal Title

    Physics in Medicine and Biology

    Volume

    47

    Issue/Number

    15

    Publication Date

    1-1-2002

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    2583

    Last Page

    2597

    WOS Identifier

    WOS:000177510200004

    ISSN

    0031-9155

    Share

    COinS