Hi Aaron,

one of the things we are trying to put in place is something like recon-all -rerun that will retain all manual interventions but reapply the newest tool to all your data. And yes, those tools have changed in the last year so you don't want to compare across versions if you can help it.

cheers, Bruce

On Tue, 29 Nov 2005, Goldman, Aaron (NIH/NIMH) wrote:

Hi, I'm interested in analyzing subcortical segmentations, and have a question about potential systematic differences between freesurfer versions. Specifically, I have a large number of subjects who've been through a year-old version of recon-all -stage1 (the skull strip, normalization, etc), and was wondering if I need to keep using the old version for consistency's sake. Have those initial steps been substantially upgraded or changed over the past year? Also, is there somewhere I can find a guide to version history?

The versions concerned are:

OLD: 08/31/04, recon-all version 1.5, tosa

NEW: 09/28/05, recon-all version 1.114, nicks

Thanks,

-Aaron-

Aaron L. Goldman

Post-Bacc IRTA

Genes, Cognition and Psychosis Program, NIMH

Building 10, Room 3C108

Phone: (301) 435-0944

Email: aarong@mail.nih.gov