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Fieldmap-Free Retrospective Registration and Distortion Correction for EPI-Based Functional Imaging

  • Clare Poynton
  • Mark Jenkinson
  • Stephen Whalen
  • Alexandra J. Golby
  • William WellsIII
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5242)

Abstract

We describe a method for correcting the distortions present in echo planar images (EPI) and registering the EPI to structural MRI. A fieldmap is predicted from an air / tissue segmentation of the MRI using a perturbation method and subsequently used to unwarp the EPI data. Shim and other missing parameters are estimated by registration. We obtain results that are similar to those obtained using fieldmaps, however neither fieldmaps, nor knowledge of shim coefficients is required.

Keywords

Echo Planar Image Geometric Distortion Registration Algorithm Distortion Correction Registration Result 
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 2008

Authors and Affiliations

  • Clare Poynton
    • 1
  • Mark Jenkinson
    • 2
  • Stephen Whalen
    • 3
  • Alexandra J. Golby
    • 3
  • William WellsIII
    • 1
    • 3
  1. 1.Computer Science and Artificial Intelligence LabMITUSA
  2. 2.Oxford Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB)University of OxfordUK
  3. 3.Brigham and Women’s Hospital, Harvard Medical SchoolUSA

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