Assemble the Data (isxconcat-sess)

The first step in the group analysis is to "assemble" the data. This means creating a single 4D file with where the 4th "time" dimension is actual all the subjects concatenated together in a common space.

To run the volume-based concatenation, run the command below. This program resamples a group of FS-FAST first-level analyses into a common space and concatenates all the sessions together into one multi-frame file suitable for use with mri_glmfit.

isxconcat-sess -sf <sessid> -analysis <analysis name> -c <contrast name> -o <output dir>

In the output directory, you will see a series of files that start with "tal":

In the new contrast name folder, you will see: