Hi all, I'd like to jump in on this topic and ask if I might be able to get any general information or documentation on how the two atlases were generated, as I've found that using the 2008 GCA file (with FreeSurfer 5.0 stable) results in less accurate segmentation of putamen and immediately surrounding structures (relative to the 2011 GCA file) but that using the 2011 version (with FreeSurfer 5.0 stable) results in markedly less accurate segmentation of the hippocampus and amygdala. I can post sample images if you'd like to see. Since my lab is interested in the volumetric measures for all three of these structures in one of our datasets, how would you suggest we proceed in the use of one or the other (or possibly in combination, using the more accurate aseg stats from one and the more accurate aseg stats from the other, as decided by visual inspection)?
Thank you! Warren -- Warren Winter Research Coordinator Boston Children's Hospital Sheridan Laboratory of Cognitive Neuroscience Division of Developmental Medicine 1 Autumn Street, AU 650 Boston, MA 02215 857-218-5224 On Sep 8, 2012, at 10:57 AM, Bruce Fischl wrote: Hi Wil, we don't rebuild these with every release - only when we think there is a significant reason to do so (e.g. an increase in accuracy or new labels, etc...) cheers Bruce On Sat, 8 Sep 2012, Irwin, William wrote: Hello- The ?RB_all_2008-03-26.gca? and ?RB_all_withskull_2008-03-26.gca? files are packaged with the 5.1 release. Is there any reason the 2011 versions (?RB_all_2011-10-25.gca? & ?RB_all_withskull_2011-10-25.gca ?)are not included in the 5.1 release or users should not update to these newer versions? Thanks, Wil _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu<mailto: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. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
