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    Semi-Automatic Vessel Boundary Detection in Cardiac 4D PC-MRI Data Using FTLE fields

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    Date
    2016
    Author
    Behrendt, Benjamin
    Köhler, Benjamin
    Gräfe, Daniel
    Grothoff, Matthias
    Gutberlet, Matthias
    Preim, Bernhard ORCID
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    Abstract
    Four-dimensional phase-contrast magnetic resonance imaging (4D PC-MRI) is a method to non-invasively acquire in-vivo blood flow, e.g. in the aorta. It produces three-dimensional, time-resolved datasets containing both flow speed and direction for each voxel. In order to perform qualitative and quantitative data analysis on these datasets, a vessel segmentation is often required. These segmentations are mostly performed manually or semi-automatically, based on three-dimensional intensity images containing the maximal flow speed over all time steps. To allow for a faster segmentation, we propose a method that, in addition to intensity, incorporates the flow trajectories into the segmentation process. This is accomplished by extracting Lagrangian Coherent Structures (LCS) from the flow data, which indicate physical boundaries in a dynamical system. To approximate LCS in our discrete images, we employ Finite Time Lyapunov Exponent (FTLE) fields to quantify the rate of separation of neighboring flow trajectories. LCS appear as ridges or valleys in FTLE images, indicating the presence of either a flow structure boundary or physical boundary. We will show that the process of segmenting low-contrast 4D PC-MRI datasets can be simplified by using the generated FLTE data in combination with intensity images.
    BibTeX
    @inproceedings {10.2312:vcbm.20161269,
    booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine},
    editor = {Stefan Bruckner and Bernhard Preim and Anna Vilanova and Helwig Hauser and Anja Hennemuth and Arvid Lundervold},
    title = {{Semi-Automatic Vessel Boundary Detection in Cardiac 4D PC-MRI Data Using FTLE fields}},
    author = {Behrendt, Benjamin and Köhler, Benjamin and Gräfe, Daniel and Grothoff, Matthias and Gutberlet, Matthias and Preim, Bernhard},
    year = {2016},
    publisher = {The Eurographics Association},
    ISSN = {2070-5786},
    ISBN = {978-3-03868-010-9},
    DOI = {10.2312/vcbm.20161269}
    }
    URI
    http://dx.doi.org/10.2312/vcbm.20161269
    https://diglib.eg.org:443/handle/10.2312/vcbm20161269
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    Eurographics Association copyright © 2013 - 2023 
    Send Feedback | Contact - Imprint | Data Privacy Policy | Disable Google Analytics
    Theme by @mire NV
    System hosted at  Graz University of Technology.
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