Hierarchical manifold learning for regional image analysis

IEEE Trans Med Imaging. 2014 Feb;33(2):444-61. doi: 10.1109/TMI.2013.2287121. Epub 2013 Oct 24.

Abstract

We present a novel method of hierarchical manifold learning which aims to automatically discover regional properties of image datasets. While traditional manifold learning methods have become widely used for dimensionality reduction in medical imaging, they suffer from only being able to consider whole images as single data points. We extend conventional techniques by additionally examining local variations, in order to produce spatially-varying manifold embeddings that characterize a given dataset. This involves constructing manifolds in a hierarchy of image patches of increasing granularity, while ensuring consistency between hierarchy levels. We demonstrate the utility of our method in two very different settings: 1) to learn the regional correlations in motion within a sequence of time-resolved MR images of the thoracic cavity; 2) to find discriminative regions of 3-D brain MR images associated with neurodegenerative disease.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Algorithms*
  • Artificial Intelligence*
  • Cardiac Imaging Techniques / methods*
  • Humans
  • Image Processing, Computer-Assisted / methods*
  • Middle Aged
  • Neuroimaging / methods*