imstack

Usage: imstack [options] image_filenames ...
Stacks up a set of 2D images into one big file (a la MGH).
Options:
  -datum type   Converts the output data file to be 'type',
                  which is either 'short' or 'float'.
                  The default type is the type of the first image.
  -prefix name  Names the output files to be 'name'.b'type' and 'name'.hdr.