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Segmentation of Brain Images Using Adaptive Atlases with Application to Ventriculomegaly

  • Navid Shiee
  • Pierre-Louis Bazin
  • Jennifer L. Cuzzocreo
  • Ari Blitz
  • Dzung L. Pham
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6801)

Abstract

Segmentation of brain images often requires a statistical atlas for providing prior information about the spatial position of different structures. A major limitation of atlas-based segmentation algorithms is their deficiency in analyzing brains that have a large deviation from the population used in the construction of the atlas. We present an expectation-maximization framework based on a Dirichlet distribution to adapt a statistical atlas to the underlying subject. Our model combines anatomical priors with the subject’s own anatomy, resulting in a subject specific atlas which we call an “adaptive atlas”. The generation of this adaptive atlas does not require the subject to have an anatomy similar to that of the atlas population, nor does it rely on the availability of an ensemble of similar images. The proposed method shows a significant improvement over current segmentation approaches when applied to subjects with severe ventriculomegaly, where the anatomy deviates significantly from the atlas population. Furthermore, high levels of accuracy are maintained when the method is applied to subjects with healthy anatomy.

Keywords

Gaussian Mixture Model Segmentation Algorithm Markov Random Field Dirichlet Distribution Deformable Registration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Navid Shiee
    • 1
  • Pierre-Louis Bazin
    • 1
    • 2
  • Jennifer L. Cuzzocreo
    • 1
  • Ari Blitz
    • 2
  • Dzung L. Pham
    • 1
    • 2
    • 3
  1. 1.The Laboratory of Medical Image ComputingJohns Hopkins UniversityUSA
  2. 2.Department of Radiology and Radiological ScienceJohns Hopkins UniversityUSA
  3. 3.Center for Neuroscience and Regenerative MedicineHenry M. Jackson FoundationUSA

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