Spectral Clustering for Medical Imaging

Chia Tung Kuo, Peter B. Walker, Owen Carmichael, Ian Davidson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Spectral clustering is often reported in the literature as successfully being applied to applications from image segmentation to community detection. However, what is not reported is that great time and effort are required to construct a graph Laplacian to achieve these successes. This problem which we call Laplacian construction is critical for the success of spectral clustering but is not well studied by the community. Instead the best Laplacian is typically learnt for each domain from trial and error. This is problematic for areas such as medical imaging since: i) the same images can be segmented in multiple ways depending on the application focus and ii) we don't wish to construct one Laplacian, rather we wish to create a method to construct a Laplacian for each patient's scan. In this paper we attempt to automate the process of Laplacian creation with the help of guidance towards the application focus. In most domains creating a basic Laplacian is plausible, so we propose adjusting this given Laplacian by discovering important nodes. We formulate this problem as an integer linear program with a precise geometric interpretation which is globally minimized using large scale solvers such as Gurobi. We show the usefulness on a real world problem in the area of fMRI scan segmentation where methods using standard Laplacians perform poorly.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE International Conference on Data Mining, ICDM
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages887-892
Number of pages6
Volume2015-January
EditionJanuary
DOIs
StatePublished - Jan 26 2015
Event14th IEEE International Conference on Data Mining, ICDM 2014 - Shenzhen, China
Duration: Dec 14 2014Dec 17 2014

Other

Other14th IEEE International Conference on Data Mining, ICDM 2014
CountryChina
CityShenzhen
Period12/14/1412/17/14

ASJC Scopus subject areas

  • Engineering(all)

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