sumrfx

From VoxBoWiki

sumrfx is a "quick and dirty" hack that will produce various summaries of the data in an RFX volume (typically a 4D volume with one stat map per subject). Please note that the averages reported by sumrfx are averages of the values in the region. If you have a t-map, it will report the average t value, not the t-value associated with the average signal. Usually you want the latter, which you can't get from the RFX volume. In that case, you want to use vbdumpstats instead.

sumrfx will allow you to calculate an unpaired t-test on the values in two regions, although the arguments are a bit cryptic. If you need this functionality, let us know and we'll try to make it easier.

Here's the help:

VoxBo sumrfx (v1.8.5pre8/May  6 2010)
summary: summarize a few relevant aspects of a subject series volume
usage:
  sumrfx -t <thresh> -m <maskfile> [-d] <4D file> [<4D file> ...]
flags:
  -m <maskfile>       mask file indicating which voxels to include
  -t <thresh>         values below thresh (incl negatives) will be excluded
  -nz                 exclude values exactly equal to zero
  -d                  include details about each contiguous region
  -c                  compare regions pairwise by t-test
  -sm <maskfile>      t-test single mask (all non-zero values)
  -mm <maskfile>      t-test multimask (each mask included separately)
notes:
  The -sm and -mm flags allow you to specify region masks to be compared by
  unpaired two-sample t-tests on the voxel values in the rfx map.