Hi Jessica, I don't think this is normal. Is this a single subject? Of course in a single subject lots of stuff can go wrong. Are the surfaces correct? And the hippo label? Are there motion artifacts in the image etc.
Anyway, you should process this with the longitudinal stream: http://freesurfer.net/fswiki/LongitudinalProcessing which should increase repeatability. Best, Martin On Wed, 2011-07-27 at 09:01 -0700, Jessica Liu wrote: > Hi, > > We found 20% differences in temporal lobe brain volume and ca. 5% > difference in the hippocampus volume between two data sets of a young > normal volunteer scanned 2 days apart. > > We use the one-step 19 hours recon-all -all procedure and directly sum > select values taken from the lh.aparc.stats, rh.aparc.stats, and > wmparc.stats. The values summed were based on information given from > https://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/2007-April/005000.html > > My question is, are these observations normal for Freesurfer? Any > comments are greatly appreciated. Thanks! > -- > Pom & Jessica > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
