Augmented active surface model for the recovery of small structures in CT

Andrew Philip Bradshaw, David S. Taubman, Michael J. Todd, John S. Magnussen, G. Michael Halmagyi

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    This paper devises an augmented active surface model for the recovery of small structures in a low resolution and high noise setting, where the role of regularization is especially important. The emphasis here is on evaluating performance using real clinical computed tomography (CT) data with comparisons made to an objective ground truth acquired using micro-CT. In this paper, we show that the application of conventional active contour methods to small objects leads to non-optimal results because of the inherent properties of the energy terms and their interactions with one another. We show that the blind use of a gradient magnitude based energy performs poorly at these object scales and that the point spread function (PSF) is a critical factor that needs to be accounted for. We propose a new model that augments the external energy with prior knowledge by incorporating the PSF and the assumption of reasonably constant underlying CT numbers.

    LanguageEnglish
    Article number6562762
    Pages4394-4406
    Number of pages13
    JournalIEEE Transactions on Image Processing
    Volume22
    Issue number11
    DOIs
    Publication statusPublished - 2013

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    Tomography
    Optical transfer function
    Recovery
    Noise

    Cite this

    Bradshaw, Andrew Philip ; Taubman, David S. ; Todd, Michael J. ; Magnussen, John S. ; Halmagyi, G. Michael. / Augmented active surface model for the recovery of small structures in CT. In: IEEE Transactions on Image Processing. 2013 ; Vol. 22, No. 11. pp. 4394-4406.
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    Augmented active surface model for the recovery of small structures in CT. / Bradshaw, Andrew Philip; Taubman, David S.; Todd, Michael J.; Magnussen, John S.; Halmagyi, G. Michael.

    In: IEEE Transactions on Image Processing, Vol. 22, No. 11, 6562762, 2013, p. 4394-4406.

    Research output: Contribution to journalArticleResearchpeer-review

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