Applying Mojette discrete Radon transforms to classical tomographic data

H. Fayad, J. P. Guédon, I. Svalbe, Y. Bizais, N. Normand

    Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

    9 Citations (Scopus)

    Abstract

    Tomographic acquisition uses projection angles evenly distributed around 2π. The Mojette transform and the discrete Finite Radon Transform (FRT) both use discrete geometry to overcome the ill-posedeness of the inverse Radon transform. This paper focuses on the transformation of acquired tomographic projections into suitable discrete projection forms. Discrete Mojette and FRT algorithms can then be used for image reconstruction. The impact of physical acquisition parameters (which produce uncertainties in the detected projection data) is also analysed to determine the possible useful interpolations according to the choice of angle acquisitions and the null space of the transform. The mean square error (MSE) reconstruction results obtained for data from analytical phantoms consistently shows the superiority of these discrete approaches when compared to the classical "continuous space" FBP reconstruction.

    Original languageEnglish
    Title of host publicationMedical Imaging 2008 - Physics of Medical Imaging
    Volume6913
    DOIs
    Publication statusPublished - 14 May 2008
    EventMedical Imaging 2008 - Physics of Medical Imaging - San Diego, CA, United States of America
    Duration: 18 Feb 200821 Feb 2008

    Conference

    ConferenceMedical Imaging 2008 - Physics of Medical Imaging
    CountryUnited States of America
    CitySan Diego, CA
    Period18/02/0821/02/08

    Keywords

    • Finite radon transform
    • Mojette transform
    • Projection acquisition
    • Tomographic reconstruction

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