2 results for Pan, Mian

  • Characterization of Curve-Like Structures in 3D Medical Images

    Klette, Gisela; Pan, Mian (2005)

    Report
    The University of Auckland Library

    You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the original CITR web site; http://citr.auckland.ac.nz/techreports/ under terms that include this permission. All other rights are reserved by the author(s). This paper proposes algorithms for the analysis of sets of confocal microscope images of human brain tissue which constitute a 3D volume. The identification of suitable features for curve-like structures in these volumes is required for subsequent classification. The final goal is the distinction between brain tissues of patients with different degrees of neurological deceases. The given volumes show varying distributions, shapes and numbers of astrocytes (i.e., brain cells whose shape resembles that of of a star). The hypothesis is that the ``distribution'' of astrocytes in brain tissue is related to the number and distribution of branch nodes (clustered into {\it junctions}) in 3D skeletons of these cells. Segmentation is followed by an application of a modified 3D thinning algorithm. Further analysis is based on our definition of `junctions' and new methods for locating such junctions. We characterize their distribution based on subdividing the volume into subcubes, also using measures of complexity of junctions and distances between junctions (based on different metrics).

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  • A Revision of a 3D Skeletonization Algorithm

    Pan, Mian; Klette, Gisela (2004)

    Report
    The University of Auckland Library

    You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the original CITR web site; http://citr.auckland.ac.nz/techreports/ under terms that include this permission. All other rights are reserved by the author(s). This report is about a project that started with studying and testing an existing program by K.Palagyi et al. published in [4]. It provides several combinations of preprocessing steps with the traditional thinning approach. This study lead to a proposal of a new characterization of non-simple voxels, which has been implemented and proved to be eĀ±cient for reducing the running time of the algorithm. Altogether, we suggest a revision of the test of voxels to be simple in the discussed 3D skeletonization algorithm.

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