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Comparison of EPI Distortion Correction Methods in Diffusion Tensor MRI Using a Novel Framework

  • Minjie Wu
  • Lin-Ching Chang
  • Lindsay Walker
  • Herve Lemaitre
  • Alan S. Barnett
  • Stefano Marenco
  • Carlo Pierpaoli
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5242)

Abstract

Diffusion weighted images (DWIs) are commonly acquired with Echo-planar imaging (EPI). B0 inhomogeneities affect EPI by producing spatially nonlinear image distortions. Several strategies have been proposed to correct EPI distortions including B0 field mapping (B0M) and image registration. In this study, an experimental framework is proposed to evaluation the performance of different EPI distortion correction methods in improving DT-derived quantities. A deformable registration based method with mutual information metric and cubic B-spline modeled constrained deformation field (BSP) is proposed as an alternative when B0 mapping data are not available. BSP method is qualitatively and quantitatively compared to B0M method using the framework. Both methods can successful reduce EPI distortions and significantly improve the quality of DT-derived quantities. Overall, B0M was clearly superior in infratentorial regions including brainstem and cerebellum, as well as in the ventral areas of the temporal lobes while BSP was better in all rostral brain regions.

Keywords

DTI EPI distortion correction B0 field mapping B-spline image registration 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Minjie Wu
    • 1
    • 2
  • Lin-Ching Chang
    • 3
  • Lindsay Walker
    • 1
  • Herve Lemaitre
    • 4
  • Alan S. Barnett
    • 4
  • Stefano Marenco
    • 4
  • Carlo Pierpaoli
    • 1
  1. 1.National Institute of Child Health and Human DevelopmentNational Institutes of HealthBethesdaUSA
  2. 2.Dept. of Electrical and Computer EngineeringUniversity of PittsburghPittsburghUSA
  3. 3.Dept. of Electrical Engineering and Computer ScienceCatholic University of AmericaWashingtonUSA
  4. 4.National Institute of Mental HealthNational Institutes of HealthBethesdaUSA

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