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Average B-Values

Average B-Values

User Interface

General Information

Module Type & Category

Type: CLI

Category: Diffusion.GTRACT

Authors, Collaborators & Contact

Author: This tool was developed by Vincent Magnotta and Greg Harris.


Contact: name, email

Module Description

Program title Average B-Values
Program description This program will directly average together the baseline gradients (b value equals 0) within a DWI scan. This is usually used after gtractCoregBvalues.
Program version 4.0.0
Program documentation-url -


Use Cases, Examples

This module is especially appropriate for these use cases:

  • Use Case 1:
  • Use Case 2:

Examples of the module in use:

  • Example 1:
  • Example 2:


  • Tutorial 1
    • Data Set 1

Quick Tour of Features and Use

A list panels in the interface, their features, what they mean, and how to use them.

  • Image Files and Parameters
    • Input Image Volume [--inputVolume] : Required: input image file name containing multiple baseline gradients to average
    • Output Image Volume [--outputVolume] : Required: name of output NRRD file containing directly averaged baseline images
    • Directions Tolerance [--directionsTolerance] : Tolerance for matching identical gradient direction pairs Default value: 0.01
    • Average B0 Only [--averageB0only] : Average only baseline gradients. All other gradient directions are not averaged, but retained in the outputVolume Default value: 0

User Interface


Notes from the Developer(s)

Algorithms used, library classes depended upon, use cases, etc.


Other modules or packages that are required for this module's use.


On the Dashboard, these tests verify that the module is working on various platforms:

Known bugs

Links to known bugs in the Slicer3 bug tracker

Usability issues

Follow this link to the Slicer3 bug tracker. Please select the usability issue category when browsing or contributing.

Source code & documentation

Links to the module's source code:

Source code:

Doxygen documentation:

More Information


Funding for this version of the GTRACT program was provided by NIH/NINDS R01NS050568-01A2S1


Publications related to this module go here. Links to pdfs would be useful.