That shows you how many subjects were included in the atlas. There's a total of 33 subjects in the atlas, and for a general purpose study there's no reason not to use all of them. Did you change the trainlist parameter in the configuration file at any point?

On Sun, 6 Jan 2013, Alessia Sarica wrote:

Dear Freesurfer Experts,i'm here again, maybe for a trivial question, but I didn't find any information about my doubt.

I'm doing tractography on 36 patients and I noticed that some of them have dpath folders named "_avg33_mni_flt" and in other patients, they are named "_avg32_mni_flt". Which is the reason for this? Something has gone wrong?

Thanks a lot, Alessia.

-- Alessia Sarica Ph.D. Student Biomedical and Informatics Engineering, Bioinformatics Laboratory, Department of Surgical and Medical Sciences, University "Magna Græcia" of Catanzaro, Viale Europa (Località Germaneto), 88100 CATANZARO, ITALY. Phone: +3909613694193