A graph matching based automatic regional registration method for sequential mammogram analysis

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    2 Citations (Scopus)

    Abstract

    This paper presents a method for associating regions of sequential mammograms automatically using graph matching. The graph matching utilises relative spatial relationships between the regions of a mammogram to establish regional correspondences between two mammograms. As a first step of the method, the mammogram is segmented into separate regions using an adaptive pyramid segmentation algorithm. This process produces both segmented regions of the mammogram and a graph. The nodes of the graph represent the segmented regions, and the lines represent the relationships between the regions. The regions are then filtered to remove undesired regions. To express the spatial relations between the regions, we use a fuzzy logic expression, which takes into account the characteristics of each region including the shape, size and orientation. The spatial relations between regions are utilised as weights of the graph. The backtrack algorithm is then used to find the common subgraph between two graphs. The proposed method is applied to 95 temporal pairs of mammograms. For each temporal mammogram pair, an average of 13.2 regions are matched. All region matches are classified as "good", "average", "poor" and "unknown" by one of the authors (FM) based on visual perception. 63.5% of region matches are identified as "good", and 23.6% as "average". The percentages of "poor" and "unknown" are 10.9% and 2% respectively. These results indicate that our registration method may be useful for establishing regional correspondence between sequential mammograms.
    Original languageEnglish
    Title of host publicationMedical Imaging 2008
    Subtitle of host publicationComputer-Aided Diagnosis
    EditorsMaryellen L Giger, Nico Karssemeijer
    Place of Publication Bellingham, Washington
    PublisherSPIE
    Number of pages11
    Volume6915
    ISBN (Print)9780819470997
    DOIs
    Publication statusPublished - Feb 2008
    EventMedical Imaging 2008: Computer-Aided Diagnosis - San Diego, United States
    Duration: 16 Feb 200821 Feb 2008

    Publication series

    NameProceedings of SPIE
    PublisherSPIE
    Volume6915
    ISSN (Print)1605-7422

    Conference

    ConferenceMedical Imaging 2008
    CountryUnited States
    CitySan Diego
    Period16/02/0821/02/08

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