Hi,<br><br>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.<br>
<br>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 <a href="https://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/2007-April/005000.html" target="_blank">https://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/2007-April/005000.html</a><br clear="all">



<br>My question is, are these observations normal for Freesurfer?  Any comments are greatly appreciated.  Thanks!<br>-- <br>Pom &amp; Jessica<br>
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