We don¹t recommend using the ft_ tools with MRI data. Instead use ciftiopen/ciftisave/ciftisavereset:
https://wiki.humanconnectome.org/display/PublicData/HCP+Users+FAQ item 2B As for your other question, the vertex indices have neuroanatomical correspondence across subjects, but that often does not equate to having the same 3D coordinates (as volumetric registration is not able to align cortical areas across subjects). Peace, Matt. On 3/29/17, 8:41 AM, "hcp-users-boun...@humanconnectome.org on behalf of Nicola Toschi" <hcp-users-boun...@humanconnectome.org on behalf of tos...@med.uniroma2.it> wrote: >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 > > >_______________________________________________ >HCP-Users mailing list >HCP-Users@humanconnectome.org >http://lists.humanconnectome.org/mailman/listinfo/hcp-users ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
