Model-guided segmentation of liver in CT and PET-CT images of child patients based on statistical region merging

Jiri Sedlar, Mariusz Bajger, Martin Caon, Gobert Lee

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    2 Citations (Scopus)

    Abstract

    The paper introduces a novel model-guided method for liver segmentation in CT and PET-CT images. Using a model liver volume as a template and a liver shape annotated in one of the patient slices, it automatically segments the whole liver volume in the patient dataset. The method is based on non-deformable registration of the model volume to the patient data and combination of components pre-segmented by statistical region merging in each patient slice to maximise the overlap with the registered model shape. It does not require construction of probabilistic atlases, large training sets, or contrast enhancement of the portal venous phase. Its performance was tested on one CT and two PET-CT child patient scans, used alternately as patient data and, annotated by an expert, as a liver model. Additionally, subsampled and denoised data were used for testing, resulting in 21 experiments. The average accuracy measured as the Dice index between the computed volume and the expert-delineated one was $84.2 \pm 4.7$ (as a percentage), which demonstrates robustness of the method to high variability in liver shape of child patients. The algorithm was developed primarily for the purpose of building voxel models of human anatomy for radiation dose calculation. The framework could be extended for segmentation of other organs and tissues necessary for construction of anatomy models.

    Original languageEnglish
    Title of host publication2016 International Conference on Digital Image Computing: Techniques and Applications (DICTA)
    Subtitle of host publicationTechniques and Applications, DICTA 2016
    EditorsAlan Wee-Chung, Brian Lovell, Clinton Fookes, Jun Zhou, Yongsheng Gao, Michael Blumenstein, Zhiyong Wang
    Place of PublicationPiscataway, NJ
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)978-1-5090-2895-5
    ISBN (Print)978-1-5090-2896-2
    DOIs
    Publication statusPublished - 22 Dec 2016
    Event2016 International Conference on Digital Image Computing: Techniques and Applications (DICTA) -
    Duration: 30 Nov 2016 → …

    Publication series

    Name2016 International Conference on Digital Image Computing: Techniques and Applications, DICTA 2016

    Conference

    Conference2016 International Conference on Digital Image Computing: Techniques and Applications (DICTA)
    Period30/11/16 → …

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