We currently have the HCP time series data (.dtseries.nii format), and we want to apply the Schaefer 200 parcels atlas to extract the mean time series at each parcel. We tried to used the Schaefer2018_200Parcels_17Networks_order.dlabel.nii, but we found the .dtseries.nii files and the Schaefer dlabel.nii files have a different number of vertices (HCP has around 90,000 and the Schaefer only has around 60,000), so we don’t know how to match the voxels to get the parcellations.
We would appreciate it if you had any thoughts or suggestions about how to do this !! Thank you!