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Automatic Segmentation of Abdominal MRI Using Selective Sampling and Random Walker

  • Janine ThomaEmail author
  • Firat Ozdemir
  • Orcun Goksel
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10081)

Abstract

MRI segmentation is a challenging task due to low anatomical contrast and large inter-patient variation. We propose a feature-driven automatic segmentation framework, combining voxel-wise classification with a Random-Walker (RW) based spatial regularization. Typically, such steps are treated independently, i.e. classification outcome is maximized without taking into account the regularization to follow. Herein we present a method for selective sampling of training patches, in view of the posterior spatial regularization. This aims to concentrate training samples near desired anatomical boundaries, around which the gain from a subsequent RW regularization will potentially be minimal. This trades off a lower classification accuracy for a higher joint segmentation performance. We compare our proposed sampling strategy to conventional uniform sampling on 20 full-body MR T1 scans from the VISCERAL dataset, both with RW and Markov Random Fields regularizations, showing Dice improvements of up to 12\(\times \) with the proposed approach.

Notes

Acknowledgements

This work was funded by the Swiss National Science Foundation (SNSF) and the Highly Specialized Medicine (HSM) project of Zurich Department of Health.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Computer Vision LabETH ZurichZürichSwitzerland
  2. 2.Computer-assisted Applications in MedicineETH ZurichZürichSwitzerland

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