Import new MRtrix3 "peaks" commands

[Lestropie]

Currently under development are two new MRtrix3 commands that will be utilised in the context of this tool.

• peaksconvert: Converts between different formats used to encode one or more discrete fibre orientations per voxel.

  • Both input and output images could be represented using spherical coordinates (potentially mathematics or physics convention) or 3-vectors; and may or may not have additional amplitude information
  • Both input and output images could be defined using some reference coordinate set; this could be real / scanner space, image space, or the same convention as the bvecs format.

• peakscheck: Performs a similar operation to the MRtrix3 dwigradcheck command, except that instead of evaluating possible transformations / shuffling of the diffusion gradient table, it instead checks whether estimated fibre orientations may have been corrupted by some misinterpretation of orientation encoding.

  • I have a basic version working, which just does axis permutations and flips; I need to augment it to also consider different possible erroneous conversions from spherical to 3-vector encodings.

It may be some time before these commands get included in a tagged MRtrix3 release; so the tool container (#4) should clone and compile the specific feature branch necessary to access these tools.

[Lestropie]

Closed by 7b54f1b73429f0572dfb3c99fe25ce883b06709d.