Hi Folks,

I have a question about entorhinal cortex volume. The entorhinal cortex is listed in ?h.aparc.stats and ?h.entorhinal_exvivo.stats. In a previous post on the mailing list, it was mentioned that we should use the volume measurement from ?h.entorhinal_exvivo.stats.

We would like to make manual corrections to the entorhinal cortex segmentation

(when required). For this task I can create a entorhinal volume from ?h.entorhinal_exvivo.label

using mri_label2vol

This entorhinal volume will be different from the one in aparc+aseg.mgz

My question is:

Has anyone published any protocols to somehow combine the two entorhinal volumes ?

Or is recommend to take the take the entorhinal volume created from ?h.entorhinal_exvivo.stats.

and overlay it on norm.mgz and edit manually (when required).

One limitation of this approach is that it would be hard to integrate this entorhinal volume back into

aparc+aseg.mgz...

Thanks

Mehul

On Wed, Dec 7, 2011 at 10:50 AM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:

Hi Catherine

I guess I would recommend the ex vivo one since it is based explicitly on architecontics and not on guessing locations from folds.

cheers
Bruce

On Wed, 7 Dec 2011, Cat Chong wrote:

Hello experts,

I am very new to freesurfer so please excuse my basic question:
We want to get measurements of entorhinal cortex volumes on a group of
people. I found these results listed in ?h.aparc.stats.
I also noticed another ?h.entorhinal_exvivo.stats, with different results.
Which should I use for a group analysis of entorhinal volume and surface
area, and why are the results very different?

very best regards,
catherine

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