Creating a label in one hemisphere based on an existing label in another hemisphere

✉️ Mailing List Archive (read-only)
1

Hello,

I have created a region in the left hemisphere by selecting my own set of
vertices (based on functional data). I would like to also create a region
as similar as possible in the right hemisphere. Does anyone know of any
functions to create a right-hemisphere region (label) using a corresponding
left-hemisphere region as input? (I asked about this on the Freesurfer
mailing list but didn't hear anything.)

Thank you,
Steve Politzer-Ahles

2

Hi Stephen,

Probably not a very helpful response: Establishing correspondence between
vertices in the 2 hemispheres is not a well posed problem.. You may be
able to make a function for a given definition of 'similarity' using the
info in the inv.src structure when you read in an inverse operator fif
file into matlab..

Regards,
Hari

3

Hi Steve,

You may be able to adapt the first part of the laterality processing stream
from the 2011 Greve et al. HBM poster to do this,
http://www.nmr.mgh.harvard.edu/martinos/publications/posters/HBM-2011/HBM11-Greve.pdf.
There are some instructions in
https://mail.nmr.mgh.harvard.edu/pipermail//freesurfer/2011-August/019869.html
.
  I've never attempted it myself -- good luck!

Jon

4

this question has been asked to me a couple of times so if someone
succeeds please let me know.

Alex

5

Thanks, this looks helpful! I'll try playing around with it.

Best,
Steve