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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