[Freesurfer] FS-FAST license?

Hi there,

What license is FS-FAST available under? There's no mention in the shell scripts or the matlab scripts. In the FS-FAST doc/ directory there's a "license.gnu", but I don't see any reference to this in the rest of the code.

If it's available under the Freesurfer license, is there a grant to make derivative works? I don't see any mention of that in the Freesurfer license...

Thanks,

nick

PS The reason I ask is because in developing my own ROI tools, such as froi, I'd like to know whether or not I have to go about things in a "clean-room" fashion; or, if I modify some of the FS-FAST code, I need to know what the license is, e.g., if it's GPL licensed, I have to distribute my code as GPL as well.