Yes, my data have been normalized to the MNI space. So, in my case, what should I do if I want to use the mri_surf2vol function?
Best, Feng
发件人：Douglas Greve greve@nmr.mgh.harvard.edu 发送时间：2015-09-29 00:00 主题：Re: [Freesurfer] Question about the volume conversion in freesurfer 收件人："freesurfer"freesurfer@nmr.mgh.harvard.edu 抄送：
This is not an easy thing to do. First of all, did you apply a nonlinear registration to get the fMRI to the normalized MNI space? If so, then you can not do what you want with the data you have pre-processed.
On 9/24/15 2:26 AM, chenhf_uestc wrote:
Dear freesurfer experts,
I want to compute functional connectivity based on the region with significantly different cortical thickness of two groups. The fMRI data have been preprocessed by using SPM software and normalized to the MNI space. However, I do not how to use the function mri_surf2vol.
The required flagged arguments include --surfva, --hemi and --volreg (i.e., volume registration file). How can I set up the --volreg argument? What is the third arguments --volreg? The online manual states that contains the matrix that maps XYZ in the reference anatomical to XYZ in the functional volume. The format of this file is that as output by tkregister2 and includes the name of the subject. It will be assumed that the input surface values are sampled on the surface of this subject.
Where could I find the volume registration file?
Any help would be greatly appreciately.
Best, Feng
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