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Dear,
I am not sure if the questions below were sent correctly to you, since I did 
not receive any copy of it.
Please find my message below.
Many thanks, looking forward to your reply.
Kind regards,
Nathalie Mertens

Van: Nathalie Mertens <nathalie.mert...@kuleuven.be>
Datum: dinsdag 18 augustus 2020 om 09:33
Aan: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Onderwerp: RBV PVC

Dear,

I do have some questions linked to RBV PVC implemented in Freesurfer:

  1.  Could you please tell me how the RBV PVC is acquired? Is the RBV PVC 
acquired based on Muller-Gartner (on a region-level, and based on only using 
gray- versus white matter), or when and how are the different regions from 
gtm_seg applied to obtain GTM?
  2.  What would be the advantage of using your technique compared to for 
instance sGTM?
  3.  Could you please tell me the difference in region-definition between 
aparc+aseg and the gtm_seg? (I saw that the latter contains less regions 
compared to aparc+aseg.) What is the reason to use the latter compared to the 
aparc+aseg, based on the definitions of the regions? (I know that gtm_seg is 
used which has a high resolution, but not quite sure, apart from the 
resolution, why you are not using aparc+aseg for the RBV PVC.)
  4.  Is there a mask applied to the gtm_seg to exclude regions that are 
located outside the brain?

Many thanks for your answers.
Kind regards,
Nathalie
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