Dear Gari, The subfield module uses a different, independent method to segment the hippocampus, and consistency with ASEG results is not explicitly enforced. That said, the subfield module is inialialized with the ASEG, and the results should be pretty close to each other, for the most part. Have you visually inspected the segmentation for those cases in which the difference looks large? Thanks, /Eugenio
On Mon, 2013-02-25 at 14:10 +0100, Garikoitz Lerma-Usabiaga wrote: > Hi, > I am calculating hippocampus volumes with 5.2 in CentOS 4. > > > I compare volumes (the same apply for lh and for rh) when calculating > as: > > Left.Hippocampus value in 1mm3 from aseg.stats > > I use the method kvlQuantifyHippocampalSubfieldSegmentations.sh and > obtain the nonPartialVolumeStatsLeft.txt, divide each value by 8 in > order to get mm3, and sum every column except > left_hippocampal_fissure. > > > I obtain quite different values, for example: > > row.names > lh.aseg > lhHIP > rh.aseg > rhHIP > 1 > S_00 > 4848.8 > 3828.187 > 4878.8 > 3767.739 > 2 > S_02 > 4153.8 > 3371.517 > 4547.6 > 3389.918 > > > Am I doing anything wrong? Should I calculate the hippos subfields > volumes differently? > > > > Many thanks! > Gari > _______________________________________________ > 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 igles...@nmr.mgh.harvard.edu Athinoula A. Martinos Center for Biomedical Imaging Department of Radiology, MGH, Harvard Medical School 149 Thirteenth Street, Suite 2301 Charlestown, Massachusetts 2129 U.S.A. _______________________________________________ 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.
