Map fixel values to a track scalar file based on an input tractogram


fixel2tsf [ options ]  fixel_in tracks tsf
  • fixel_in: the input fixel data file (within the fixel directory)
  • tracks: the input track file
  • tsf: the output track scalar file


This command is useful for visualising all brain fixels (e.g. the output from fixelcfestats) in 3D.


  • -angle value the max anglular threshold for computing correspondence between a fixel direction and track tangent (default = 45 degrees)

Standard options

  • -info display information messages.
  • -quiet do not display information messages or progress status. Alternatively, this can be achieved by setting the MRTRIX_QUIET environment variable to a non-empty string.
  • -debug display debugging messages.
  • -force force overwrite of output files. Caution: Using the same file as input and output might cause unexpected behaviour.
  • -nthreads number use this number of threads in multi-threaded applications (set to 0 to disable multi-threading).
  • -help display this information page and exit.
  • -version display version information and exit.

Author: David Raffelt (

Copyright: Copyright (c) 2008-2018 the MRtrix3 contributors.

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, you can obtain one at

MRtrix3 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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