Dear FSL Experts,
I am having a quick question concerning the 4D file of the vertex analysis using first_utlis together with the ReconMNI option.
I hope I understand it correctly that these values (one image per subject) represent the signed perpendicular distance from the average surface of the particular group under study. In our case the values range more or less between +/- 2.5.
My question is what is the unit of these values? Are these milimeters (would be a surprisingly large range then) or are these already Z-scores, i.e. standard deviation units. If the latter is true what have they been originally?
Kind regards and thank you very much in advance for your help!
Falk
|