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Article Dans Une Revue Medical Image Analysis Année : 2002

Distortion correction and robust tensor estimation for MR diffusion imaging.

Résumé

This paper presents a new procedure to estimate the diffusion tensor from a sequence of diffusion-weighted images. The first step of this procedure consists of the correction of the distortions usually induced by eddy-current related to the large diffusion-sensitizing gradients. This correction algorithm relies on the maximization of mutual information to estimate the three parameters of a geometric distortion model inferred from the acquisition principle. The second step of the procedure amounts to replacing the standard least squares-based approach by the Geman-McLure M-estimator, in order to reduce outlier-related artefacts. Several experiments prove that the whole procedure highly improves the quality of the final diffusion maps.

Domaines

Imagerie
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Dates et versions

hal-00349706 , version 1 (03-01-2009)

Identifiants

  • HAL Id : hal-00349706 , version 1
  • PUBMED : 12270226

Citer

J.-F. Mangin, C. Poupon, C. Clark, D. Le Bihan, Isabelle Bloch. Distortion correction and robust tensor estimation for MR diffusion imaging.. Medical Image Analysis, 2002, 6 (3), pp.191-8. ⟨hal-00349706⟩
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