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Detection and identification of macromolecular complexes in cryo-electron tomograms using support vector machines

  • Yuxiang Chen*
  • , Thomas Hrabe
  • , Stefan Pfeffer
  • , Olivier Pauly
  • , Diana Mateus
  • , Nassir Navab
  • , Friedrich Förster
  • *Corresponding author for this work
  • Technical University of Munich
  • Max Planck Institute of Biochemistry
  • Helmholtz Zentrum München - German Research Center for Environmental Health
  • Molecular Structural Biology

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Detection and identification of macromolecular complexes in cryo-electron tomograms is challenging due to the extremely low signal-to-noise ratio (SNR). While the state-of-the-art method is template matching with a single template, we propose a 3-step supervised learning approach: (i) pre-detection of candidates, (ii) feature calculation, and (iii) final decision using a support vector machine (SVM). We use two types of features for SVM: (i) correlation coefficients from multiple templates, and (ii) rotation invariant features derived from spherical harmonics. Experiments conducted on both simulated and experimental tomograms show that our approach outperforms the state-of-the-art method.

Original languageEnglish
Title of host publicationProceedings - International Symposium on Biomedical Imaging
Pages1373-1376
Number of pages4
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 9th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2012 - Barcelona, Spain
Duration: 2 May 20125 May 2012

Conference

Conference2012 9th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2012
Country/TerritorySpain
CityBarcelona
Period2/05/125/05/12

Keywords

  • Cryo-electron tomography
  • spherical harmonics
  • support vector machines
  • template matching

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