Ciao Stefano,

- the output of this module is volumetric - there are therefore no vertices.

- You're right about the size of the voxels: they are .5x.5.x5, so if you want a volume in cubic millimeters, you have to divide the volume in voxels by 8.

- If you're performing a volumetric analysis of the subfields, I would recommend that you correct for ICV and age.

Cheers,

/Eugenio

On Tue, January 14, 2014 7:26 am, stdp82@virgilio.it wrote:

Hi list, I have some question regarding hippo-subfield parcellation.If I understand the final results are thickness of each ROI but assuming a voxel of 0.5x0.5x0.5.Therefore, a correction is request. A-How is the best way to do it?B-Correction for mean thickness or ICV is advised? C-Is possible use qdec GUI or other GUI to performe a vertex by vertex comparison?D-Is there a way to visualize the groups differences in a map? Thanks and best regards,

Stefano _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

------------------------------------------------------------------------------------- Juan Eugenio Iglesias, PhD http://www.jeiglesias.com iglesias@nmr.mgh.harvard.edu Athinoula A. Martinos Center for Biomedical Imaging 149 Thirteenth Street, Suite 2301 Charlestown, Massachusetts 2129 U.S.A.