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For the stable Slicer documentation, visit the 4.6 page.

Introduction and Acknowledgements

Title: Tractography Measurements
Author(s)/Contributor(s): Alex Yarmarkovich, Fan Zhang, Lauren O'Donnell (SPL, LMI, BWH, SlicerDMRI)
License: 3D Slicer Contribution and Software License Agreement
Acknowledgements: The SlicerDMRI developers gratefully acknowledge funding for this project provided by NIH NCI ITCR U01CA199459 (Open Source Diffusion MRI Technology For Brain Cancer Research), NIH P41EB015898 (National Center for Image-Guided Therapy) and NIH P41EB015902 (Neuroimaging Analysis Center), as well as the National Alliance for Medical Image Computing (NA-MIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149.


Surgical Planning Laboratory  
Multiple tracts from Corpus callosum (CC)  
Tensor measurements of the CC tracts  

Module Description

Compute whole-fiber scalar measurements from a directory of VTK fiber bundle files. Files must have tensors stored in as cell data Slicer tensor convention.

Use Cases

Most frequently used for these scenarios:

  • Use Case 1: Compute measurements from all tractography files in a directory (from command-line interface or Slicer).
  • Use Case 2: Compute measurements using a fiber tract hierarchy to select and combine tractography files in a directory (for example to define corpus callosum subregions). Use this from command-line interface (CLI) only.


Links to tutorials that use this module

Panels and their use


  • IO: Input/output parameters
    • Select Input Type (inputType): Type of input: MRML Hierarchy, or directory containing VTK polydata files.
    • Fibers Hierarchy (FiberHierarchyNode): Fibers top hierarchy node
    • Fibers File Folder (InputDirectory): Directory from which to read fibers
    • Output Text File (outputFile): Output measurement file
    • Select Output Format (outputFormat): Output format: print statistics along column vs. row.
    • Output Field Separator (outputSeparator): Output file field separator (Comma, Space, or Tab).
    • Print statistics for all clusters and children. (printAllStatistics): Print statistics for all clusters and children. In hierarchy mode, by default this module only prints statistics for specified cluster(s).
  • Advanced Settings: Advanced settings
    • Output more statistics (moreStatistics): Output additional statistics, including maximum, minimum, median, variance.

List of parameters generated transforming this XML file using this XSL file. To update the URL of the XML file, edit this page.

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