It is the number of points in the labelExternal Email - Use Caution
Hello freesurfer experts,
I am using mri_label2vol to convert my surface drawn label (of functional activity) to functional space (nifti) for more analysis (prf).
When I open the label file in text editor - it shows two lines at the top#!ascii label , from subject vox2ras=TkReg
1287
1) Does the number 1287 represent selected voxels or does it represent something else?
You mean 300 active voxels, right? There should be as many voxels as in func_ref. Probably func_ref has a much larger voxels size, so there are fewer voxels.
I use the following command to convert:
mri_label2vol --subject sub-01 --hemi lh --label CustomLabel/lh.V1.label --regheader /sub-01/mri/orig.mgz --temp /sub-01/ses-1/mri_files/func_ref_file.nii.gz --o /prfdata/prfroi_mask/lh.V1.nii --fillthresh .3 --proj frac 0 1 .1
2) When I load the nifti file in python, I do not get 1287 voxels, I get only ~300 voxels. Why do I get so few voxels ?
Any help is appreciated.
Cheers,
Dev
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