The easiest thing is to use mri_label2vol, something like
mri_label2vol --label yourlabel.label --temp functemplate.nii --reg 
register.dat --proj frac 0 1 .1 --hemi lh --subject subject --o 
yourlabel.nii

doug

Zhangyuanchao wrote:
> Thanks for your response!
>
> In fact, the label that I want to convert to functional space was 
> obtained by between-group comparisons, so it does not belong to any 
> existing parcellation template.
>
> What should I do in this case?
>
> Thanks!
>
> Best,
>
> --- *11年12月13日,周二, Douglas N Greve 
> /<gr...@nmr.mgh.harvard.edu>/* 写道:
>
>
>     发件人: Douglas N Greve <gr...@nmr.mgh.harvard.edu>
>     主题: Re: [Freesurfer] convert surface label on to functional image
>     收件人: "Zhangyuanchao" <woshizhan...@yahoo.cn>
>     抄送: freesurfer@nmr.mgh.harvard.edu
>     日期: 2011年12月13日,周二,上午5:48
>
>     Hi Yuanchao, I would recommend that you use the aparc+aseg.mgz
>     file for this. This file has cortical labels already in the
>     volume, you just need to map them to your functional space,
>     something like
>
>     mri_label2vol --aparc+aseg --temp functemplate.nii --reg
>     register.dat --o aparc+aseg.fmri.nii
>
>     doug
>
>     Zhangyuanchao wrote:
>     > hi, expert,
>     >
>     > By mapping a surface label to a functional template, I want to
>     extract the corresponding cortical gray matter region in the
>     functional space. I know I should use the mri_label2vol command.
>     > In the help page of mri_label2vol, I see some examples of this
>     command.
>     >
>     > 2. Convert a surface label into a binary mask in the functional
>     space.
>     > Fill in all the cortical gray matter. Require that a functional
>     voxel
>     > be filled at least 30% by the label:
>     >
>     > mri_label2vol   --label lh-avg_central_sulcus.label   --temp
>     f.nii   --reg register.dat   --fillthresh .3   --proj frac 0 1
>     .1   --subject bert --hemi lh
>     >   --o cent-lh.nii
>     >
>     > 3. Convert a surface label into a binary mask in the functional
>     space.
>     > Sample a 1mm ribbon 2mm below the gray/white surface. Do not
>     require a fill threshold:
>     >
>     > mri_label2vol   --label lh-avg_central_sulcus.label   --temp
>     f.nii   --reg register.dat   --proj abs -3 -2 .1   --subject bert
>     --hemi lh
>     >   --o cent-lh.nii
>     >
>     > I want to extract the cortical gray matter on the functional
>     images corresponding to the surface label. I do not know which of
>     the above commands could obtain the result I want and which
>     parameters I should use to obtain what I want.
>     >
>     > For example 3, I do not quite catch what "Sample a 1mm ribbon
>     2mm below the gray/white surface. " this sentence means.
>     > Thanks for your help!
>     >
>     >
>     > Best
>     >
>     > Yuanchao
>     >
>     >
>     ------------------------------------------------------------------------
>     >
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>
>     -- Douglas N. Greve, Ph.D.
>     MGH-NMR Center
>     gr...@nmr.mgh.harvard.edu </mc/compose?to=gr...@nmr.mgh.harvard.edu>
>     Phone Number: 617-724-2358 Fax: 617-726-7422
>
>     Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
>     FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
>
>
>
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>

-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358 
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html

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