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
> 
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