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The TORTOISE software package is used for processing diffusion MRI data. It contains four main modules:

  • DIFF PREP is used for image resampling, motion, eddy current distortion, and EPI distortion correction using a structural image as target, and for rigid body re-orientation of single subject data to a common space.
  • DR BUDDI is used for EPI distortion correction using pairs of diffusion data sets acquired with opposite phase encoding (blip-up blip-down acquisitions).
  • DIFF CALC software is used for tensor fitting, error analysis, directionally encoded color map visualization and ROI analysis
  • DR TAMAS (Diffeomorphic Registration for Tensor Accurate alignMent of Anatomical Structures) is a novel framework for inter-subject registration and template creation from Diffusion Tensor Imaging (DTI) data sets.


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