dirmerge

Synopsis

Splice / merge multiple sets of directions in such a way as to maintain near-optimality upon truncation

Usage

dirmerge [ options ]  subsets bvalue files [ bvalue files ... ] out

  • subsets: the number of subsets (eg. phase encoding directions) per b-value

  • bvalue files: the b-value and sets of corresponding files, in order

  • out: the output directions file, with each row listing the X Y Z gradient directions, the b-value, and an index representing the phase encode direction

Options

  • -unipolar_weight value set the weight given to the unipolar electrostatic repulsion model compared to the bipolar model (default: 0.2).

  • -firstisfirst choose the first volume in the list from the first shell, rather than choosing such from the shell with the most volumes (replicates behaviour prior to version 3.1.0)

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).

  • -config key value (multiple uses permitted) temporarily set the value of an MRtrix config file entry.

  • -help display this information page and exit.

  • -version display version information and exit.

References

Tournier, J.-D.; Smith, R. E.; Raffelt, D.; Tabbara, R.; Dhollander, T.; Pietsch, M.; Christiaens, D.; Jeurissen, B.; Yeh, C.-H. & Connelly, A. MRtrix3: A fast, flexible and open software framework for medical image processing and visualisation. NeuroImage, 2019, 202, 116137

Author: J-Donald Tournier (jdtournier@gmail.com)

Copyright: Copyright (c) 2008-2024 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 http://mozilla.org/MPL/2.0/.

Covered Software is provided under this License on an “as is” basis, without warranty of any kind, either expressed, implied, or statutory, including, without limitation, warranties that the Covered Software is free of defects, merchantable, fit for a particular purpose or non-infringing. See the Mozilla Public License v. 2.0 for more details.

For more details, see http://www.mrtrix.org/.