Hi everyone, i am trying for the MEG practicals to downsample a 32K dconn fMRI group functional connectivity cifti:
HCP_S900_820_rfMRI_MSMAll_groupPCA_d4500ROW_zcorr.dconn.nii into a dconn cifti in the 4K space that we use in the MEG analysis in OT4. I am trying to use cifti-resample to do so. I know i have to use it twice, once along COLUMN and then along ROW directions. However I am not sure how to set the cifti-resample input arguments correctly. I have the following files : Input functional connectivity file from fMRI in 32K space: HCP_S900_820_rfMRI_MSMAll_groupPCA_d4500ROW_zcorr.dconn.nii Input Sphere Left (32K space): S900.L.sphere.32k_fs_LR.surf.gii Input Sphere Right (32K space): S900.R.sphere.32k_fs_LR.surf.gii Output Sphere Left (4K space): Sphere.4k.L.surf.gii Output Sphere Right (4K space): Sphere.4k.R.surf.gii I have a "template" (not sure if it is actually suitable for a template) dconn file in the 4K space, called testtemplate4K.dconn.nii. This is a just a dconn file of functional connectivity computed directly from MEG data in the 4K space. The issue is that the 32K functional connectivity matrix contains connectivity between all vertices , in both left and right hemispheres and i am not sure if such a connectivity file can be divided into left and right. So this file is defined over both hemispheres. Then I have the input and output spaces defined with sphere files, different for left and right hemispheres. After reading the description of cifti-resample I tried running the following (with wb_command 1.2): wb_command -cifti-resample HCP_S900_820_rfMRI_MSMAll_groupPCA_d4500ROW_zcorr.dconn.nii COLUMN testtemplate4K.dconn.nii COLUMN ADAP_BARY_AREA CUBIC testdconnresamp1.dconn.gii -left-spheres S900.L.sphere.32k_fs_LR.surf.gii Sphere.4k.L.surf.gii -right-spheres S900.R.sphere.32k_fs_LR.surf.gii Sphere.4k.R.surf.gii and i got the error: ERROR: left area data is missing I thought that the left area data is in the input dconn 32K dconn cifti. Could you please have a look in the above command and advice on what i am doing wrong? Thank you very much Best Giorgos --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
