Hello all,
I have three questions related to find anatomical information.
1) Which function can generate mask.img and mask.hdr? I need two masks
for both unnormalized images and normalized images.
2) How to obtain the anatomical information (talairach daemon)? Now I am
doing for the following way.
a) Normalized images. MNI coordinate -> Tal coordinate (by mni2tal) then
search talairach daemon database.
b) Nonnormalized iamges. I have a mask.img for nonnormalized images. For
each voxel in the mask I set a non-zero value and set 0 for all other
voxels. Then do the normalization by spm_write_sn and get a normalized
mask image. Because normalization will change the voxel size from
3.125*3.125*6 to 2*2*2, there would be more than one position with
non-zero value. Averaging the non-zero positions let me have a MNI
coordinate for this voxel in nonnormalized image. So on so forth to get
all the MNI coordinates for nonnormalized mask.
Does this method work fine or there is another smart way to do it?
3) Does every coordinate in Tal space have the record in Talairach
Daemon database? Below are my search results, the first three numbers
are coordinates in Tal space.
-1, -71, -38, ** No data at this point. **
3, -71, -38, ** No data at this point. **
Thanks.
Wei
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