Dear List,
I am trying to do some postprocessing on myelin and thickness maps (164k
versions) contained in the MNINonLinear Directory of the Structural
dataset (e.g. ${subject}.corrThickness_MSMAll.164k_fs_LR.dscalar.nii and
${subject}.MyelinMap_BC_MSMAll.164k_fs_LR.dscalar.nii).
I thought these data would all be in the same atlas space across
subjects, hence I was expecting to find the same vertex coordinates for
all subjects. Instead, when reading the data into matlab (
'ft_cifti_read' and gifti') every subject seems to have their own
distinct vertex locations. Also, the spherical gifti surfaces appear to
be sampled at different coordinates across subjects.
Can I assume that, nonetheless, anatomical correspondence is preserved
across subjects? Could I, for example, take the vertex locations from
${subject}.R.sphere.164k_fs_LR.surf.gii, associate the scalar values in
${subject}.MyelinMap_BC_MSMAll.164k_fs_LR.dscalar.nii to each vertex,
interpolate on the sphere and assume that I can superimpose the results
of this procedure across subjects?
Thanks very much in advance!
Nicola
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