Dear freesurfers,
I'm new to freesurfer and have a problem using --apply_inverse_transform
with the .m3z warp. Any help would be greatly appreciated:
I've been running a multivariate fmri decoding study, and have used
freesurfer to generate anatomical masks which I've used as ROIs for the
multivariate analysis in the native space of each subject.
I then took the pattern of informative voxels from each subject as a
binary mask, and warped it into standard space using the freesurfer
high-dimensional warp (I am looking at subcortical structures, so this
level of registration accuracy is quite important)
with the following command:
mri_convert -ot nifti1 ~/inputimage --apply_transform
~/transforms/talairach.m3z ~/outputimage.img
Which seems to have worked fine. I've then performed some overlap
analyses on these warped binary images, and created a new binary image
representing the between-subject overlap. What I really want to do next
is to warp this back into the native space for each subject and use as
an ROI for further multivariate analyses. To do this I tried the
following command:
mri_convert -it nifti1 -ot nifti1 ~/inputimage.img
--apply_inverse_transform ~/transforms/talairach/m3z ~/outputimage.img
which gave me the following error message:
mriBuildVoronoiDiagramFloat: incorrect input type(s)
Any ideas on what I'm doing wrong here?
Many thanks,
Martin