Thanks Koen. On Thu, Nov 17, 2011 at 6:14 AM, Koen Van Leemput <k...@nmr.mgh.harvard.edu>wrote:
> The answer is close to what Shashwath suggested, except that the > "Hippocampus" segmentation is really computed at the same time as all > the other subfields. For unfortunate reasons, the tail of the > hippocampus that is not further subdivided in our manual training > segmentations was called "Hippocampus" for lack of other good names - > it really should have been "Part of the Hippocampus Tail that We > Didn't Subdivide Manually". > > If you want to compute the total volume of the hippocampus, you'll > need to add the volume of this part, though.. > > Hope this helps, > > Koen > > > On Wed, Nov 16, 2011 at 2:10 PM, Alan Francis <alandarkene...@gmail.com> > wrote: > > Thanks Shashwath. > > > > On Wed, Nov 16, 2011 at 2:04 PM, Shashwath <shashwath...@gmail.com> > wrote: > >> > >> Alan- I believe the label "hippocampus" here refers to the remaining > hippo > >> segment after the algorithm has completed labelling of all subfields. > In > >> essence this would not be a measure that conveys very meaningful info. > >> > >> Sent from my iPhone > >> > >> On Nov 16, 2011, at 1:01 PM, Alan Francis <alandarkene...@gmail.com> > >> wrote: > >> > >> > Hi Koen and FreeSurfers: > >> > > >> > I have a 3T dataset that has undergone processing using 5.1. I have > also > >> > run the Hippo sub fields command. Here are my results: > >> > > >> > [root@NeuroImage-Gamma mri]# kvlQuantifyPosteriorProbabilityImages > >> > $FREESURFER_HOME/data/GEMS/compressionLookupTable.txt > posterior_right_* > >> > posterior_Right-Hippocampus.mgz > >> > > >> > volumeInVoxels: > >> > right_CA1: 2473.34 > >> > right_CA2-3: 7530.08 > >> > right_CA4-DG: 4160.99 > >> > right_fimbria: 520.14 > >> > right_hippocampal_fissure: 376.772 > >> > right_presubiculum: 2780.65 > >> > right_subiculum: 4230.04 > >> > Right-Hippocampus: 2277.69 > >> > > >> > My question is : Since these are "subfields" of the Hippocampus, > should > >> > not the sum of all subregions be equal the volume of the Right > Hippocampus? > >> > > >> > Thanks so much! > >> > > >> > Alan Francis > >> > > >> > Beth Israel Deaconess Medical Center, BOSTON > >> > > >> > _______________________________________________ > >> > 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. > > > > > > _______________________________________________ > > 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. > > > > >
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