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DTI BASED STRUCTURAL DAMAGE CHARACTERIZATION FOR DISORDERS OF CONSCIOUSNESS.

F Gómez1, A Soddu1, Q Noirhomme1

  • 1Coma Science Group, Cyclotron Research Center, Neurology Departament, University Hospital of Liége.

Proceedings. International Conference on Image Processing
|June 26, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method using Generalized Ordered Weighted Aggregations (GOWA) to analyze MRI Diffusion Tensor Imaging (DTI) for brain damage detection in Disorders of Consciousness patients. The new approach offers improved characterization and classification of brain injuries compared to existing methods.

Keywords:
Diffusion Tensor Imaging (DTI)Disease ClassificationDisorders of consciousnessGeneralized Ordered Weighted AggregationsStructural DamageVegetative State

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Area of Science:

  • Neuroimaging
  • Medical Physics
  • Biomedical Engineering

Background:

  • MRI Diffusion Tensor Imaging (DTI) is used to detect structural brain damage in Disorders of Consciousness (DoC).
  • Current DTI analysis relies on scalar indices derived from tensor diffusivity, often assuming unrealistic linear relationships for damaged brains.
  • Existing methods may not accurately capture complex water diffusivity deviations in severely damaged brain tissue.

Purpose of the Study:

  • To propose a new family of scalar quantities based on Generalized Ordered Weighted Aggregations (GOWA) for characterizing morphological brain damage.
  • To develop a tensor diffusivity estimation that accounts for deviations in water diffusivity due to damaged tissue.
  • To create an affine-invariant DTI tensor feature using regional tissue histograms for improved patient classification.

Main Methods:

  • Developed a novel GOWA-based approach to estimate tensor diffusivity by weighting and combining orthogonal tensor strengths.
  • Constructed an affine-invariant DTI tensor feature utilizing regional tissue histograms.
  • Evaluated the proposed method on a cohort of 48 patients with Disorders of Consciousness (23 VS/UWS, 25 MCS).

Main Results:

  • The proposed GOWA-based scalar quantities effectively capture deviations in water diffusivity associated with damaged brain tissue.
  • The newly constructed affine-invariant DTI tensor feature demonstrated superior performance.
  • Experiments showed that the new representation outperforms state-of-the-art tensor-based scalar representations in characterization and classification tasks.

Conclusions:

  • The novel GOWA-based DTI analysis provides a more accurate method for characterizing brain damage in patients with Disorders of Consciousness.
  • This approach offers improved diagnostic capabilities for distinguishing between Vegetative State/Unresponsive Wakefulness Syndrome and Minimally Conscious State.
  • The findings suggest a significant advancement in neuroimaging techniques for assessing brain injury severity and patient prognosis.