[Bruce wrote]
sounds reasonable to me, but we should call it something else (normalized FI/CI?)
Yes, dividing out area does look like a first step, justified by the way the per-vertex values are calculated. This gives the result units of mm^-2, which maybe has an interpretation something along the lines of "folds per square millimeter".
But, as noted in off-list emails, I think it would be premature to release an "NewFI" revised only in this way, because it suggests that the other principles of FI are sound, which I'm currently not confident about.
Rudolph and I are in the process of reconciling our understandings of how the FI calculations currently behave, and whether that was what was intended (and probably whether what was intended is even a useful idea).
Anyhow, hopefully the outcome of this will be better calcs implementing something useful, (with documentation of intent and usefulness :-).
Graham _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
