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Globally-Optimal Anatomical Tree Extraction from 3D Medical Images Using Pictorial Structures and Minimal Paths

  • Zahra Mirikharaji
  • Mengliu Zhao
  • Ghassan Hamarneh
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10434)

Abstract

Extracting centerlines of anatomical trees (e.g., vasculature and airways) from 3D medical images is a crucial preliminary step for various medical applications. We propose an automatic tree extraction method that leverages prior knowledge of tree topology and geometry and ensures globally-optimal solutions. We define a pictorial structure with a corresponding cost function to detect tree bifurcations in anatomical trees with predefined topology. The tree bifurcations are encoded as nodes in the pictorial structure and are associated with an artificial neural network (ANN) based unary term. The geometrical (direction and length) statistics of tree branches are learned from a training set and encoded as geometrical priors for regularizing the pictorial structure edges. Finally, detected bifurcations as well as the ANN tubularity scores, are leveraged to trace globally optimal minimal paths along 3D tree centrelines. Our method outperforms competing state-of-the-art when evaluated on 3D synthesized vasculature and lung airways in CT and our results demonstrate the advantages of incorporating tree statistics and global optimization for this task.

Keywords

Tree-like Pictorial structure Geometrical prior Bifurcation detection Centerline extraction Global optimization 

Notes

Acknowledgments

Thanks to the Natural Sciences and Engineering Research Council (NSERC) of Canada for partially funding this work.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Zahra Mirikharaji
    • 1
  • Mengliu Zhao
    • 1
  • Ghassan Hamarneh
    • 1
  1. 1.Medical Image Analysis LabSimon Fraser UniversityBurnabyCanada

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