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Manifold Learning of COPD

  • Felix J. S. BragmanEmail author
  • Jamie R. McClelland
  • Joseph Jacob
  • John R. Hurst
  • David J. Hawkes
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10435)

Abstract

Analysis of CT scans for studying Chronic Obstructive Pulmonary Disease (COPD) is generally limited to mean scores of disease extent. However, the evolution of local pulmonary damage may vary between patients with discordant effects on lung physiology. This limits the explanatory power of mean values in clinical studies. We present local disease and deformation distributions to address this limitation. The disease distribution aims to quantify two aspects of parenchymal damage: locally diffuse/dense disease and global homogeneity/heterogeneity. The deformation distribution links parenchymal damage to local volume change. These distributions are exploited to quantify inter-patient differences. We used manifold learning to model variations of these distributions in 743 patients from the COPDGene study. We applied manifold fusion to combine distinct aspects of COPD into a single model. We demonstrated the utility of the distributions by comparing associations between learned embeddings and measures of severity. We also illustrated the potential to identify trajectories of disease progression in a manifold space of COPD.

Notes

Acknowledgements

This work was supported by the EPSRC under Grant EP/H046410/1 and EP/K502959/1, and the UCLH NIHR RCF Senior Investigator Award under Grant RCF107/DH/2014. It used data (phs000179.v3.p2) from the COPDGene study, supported by NIH Grant U01HL089856 and U01HL089897.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Felix J. S. Bragman
    • 1
    Email author
  • Jamie R. McClelland
    • 1
  • Joseph Jacob
    • 1
  • John R. Hurst
    • 2
  • David J. Hawkes
    • 1
  1. 1.Centre for Medical Image ComputingUniversity College LondonLondonUK
  2. 2.UCL RespiratoryUniversity College LondonLondonUK

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