See the ITK-SNAP project page. To use ITK-SNAP, you’ll use the module tool.

You can see what versions are available by using:

[me@login01 ~]$ module avail itksnap

------------------------------ /opt/modulefiles -------------------------------
   itksnap/3.8.0

Use "module spider" to find all possible modules and extensions.
Use "module keyword key1 key2 ..." to search for all possible modules matching
any of the "keys".

To load a specific version, you would use:

[me@login01 ~]$ module load itksnap/3.8.0

while the "itksnap" wildcard will load the default version, itksnap-3.8.0 in this case.

You should now be able to run ITK-SNAP commands:

[me@login01 ~]$ itksnap --help

ITK-SnAP Command Line Usage:
  /export/itksnap/itksnap-3.8.0/lib/snap-3.8.0/ITK-SNAP [options] [main_image]
Image Options:
  -g FILE              : Load the main image from FILE
  -s FILE              : Load the segmentation image from FILE
  -l FILE              : Load label descriptions from FILE
  -o FILE [FILE+]      : Load additional images from FILE
                        :   (multiple files may be provided)
  -w FILE              : Load workspace from FILE
                        :   (-w cannot be mixed with -g,-s,-l,-o options)
Additional Options:
  -z FACTOR            : Specify initial zoom in screen pixels/mm
  --cwd PATH           : Start with PATH as the initial directory
  --threads N          : Limit maximum number of CPU cores used to N.
  --scale N            : Scale all GUI elements by factor of N (e.g., 2).
  --geometry WxH+X+Y   : Initial geometry of the main window.
Debugging/Testing Options:
  --debug-events       : Dump information regarding UI events
  --test list          : List available tests.
  --test TESTID        : Execute a test.
  --testdir DIR        : Set the root directory for tests.
  --testacc factor     : Adjust the interval between test commands by factor (e.g., 0.5).
  --css file           : Read stylesheet from file.
  --opengl MAJOR MINOR : Set the OpenGL major and minor version. Experimental.
  --testgl             : Diagnose OpenGL/VTK issues.