Hi, Tim C. can confirm, but if you are trying to resample a CIFTI fMRI data file, such as a dense connectivity *.dconn, I would try using Connectome Workbench <http://humanconnectome.org/software/connectome-workbench.html> : wb_command -cifti-resample
Here’s the help information <http://humanconnectome.org/software/workbench-command.php> for the -cifti-resample command: RESAMPLE A CIFTI FILE TO A NEW CIFTI SPACE wb_command -cifti-resample <cifti-in> - the cifti file to resample <direction> - the direction of the input that should be resampled <cifti-template> - a cifti file containing the cifti space to resample to <template-direction> - the direction of the template to use as the resampling space <surface-method> - specify a surface resampling method <volume-method> - specify a volume interpolation method <cifti-out> - output - the output cifti file [-surface-largest] - use largest weight instead of weighted average when doing surface resampling [-volume-predilate] - dilate the volume components before resampling <dilate-mm> - distance, in mm, to dilate [-surface-postdilate] - dilate the surface components after resampling <dilate-mm> - distance, in mm, to dilate [-affine] - use an affine transformation on the volume components <affine-file> - the affine file to use [-flirt] - MUST be used if affine is a flirt affine <source-volume> - the source volume used when generating the affine <target-volume> - the target volume used when generating the affine [-warpfield] - use a warpfield on the volume components <warpfield> - the warpfield to use [-fnirt] - MUST be used if using a fnirt warpfield <source-volume> - the source volume used when generating the warpfield [-left-spheres] - specify spheres for left surface resampling <current-sphere> - a sphere with the same mesh as the current left surface <new-sphere> - a sphere with the new left mesh that is in register with the current sphere [-left-area-surfs] - specify left surfaces to do vertex area correction based on <current-area> - a relevant left anatomical surface with current mesh <new-area> - a relevant left anatomical surface with new mesh [-left-area-metrics] - specify left vertex area metrics to do area correction based on <current-area> - a metric file with vertex areas for the current mesh <new-area> - a metric file with vertex areas for the new mesh [-right-spheres] - specify spheres for right surface resampling <current-sphere> - a sphere with the same mesh as the current right surface <new-sphere> - a sphere with the new right mesh that is in register with the current sphere [-right-area-surfs] - specify right surfaces to do vertex area correction based on <current-area> - a relevant right anatomical surface with current mesh <new-area> - a relevant right anatomical surface with new mesh [-right-area-metrics] - specify right vertex area metrics to do area correction based on <current-area> - a metric file with vertex areas for the current mesh <new-area> - a metric file with vertex areas for the new mesh [-cerebellum-spheres] - specify spheres for cerebellum surface resampling <current-sphere> - a sphere with the same mesh as the current cerebellum surface <new-sphere> - a sphere with the new cerebellum mesh that is in register with the current sphere [-cerebellum-area-surfs] - specify cerebellum surfaces to do vertex area correction based on <current-area> - a relevant cerebellum anatomical surface with current mesh <new-area> - a relevant cerebellum anatomical surface with new mesh [-cerebellum-area-metrics] - specify cerebellum vertex area metrics to do area correction based on <current-area> - a metric file with vertex areas for the current mesh <new-area> - a metric file with vertex areas for the new mesh Resample cifti data to a different brainordinate space. Use COLUMN for the direction to resample dscalar, dlabel, or dtseries. Resampling both dimensions of a dconn requires running this command twice, once with COLUMN and once with ROW. If you are resampling a dconn and your machine has a large amount of memory, you might consider using -cifti-resample-dconn-memory to avoid writing and rereading an intermediate file. If spheres are not specified for a surface structure which exists in the cifti files, its data is copied without resampling or dilation. Dilation is done with the 'nearest' method, and is done on <new-sphere> for surface data. Volume components are padded before dilation so that dilation doesn't run into the edge of the component bounding box. The recommended resampling methods are ADAP_BARY_AREA and CUBIC (cubic spline), except for label data which should use ADAP_BARY_AREA and ENCLOSING_VOXEL. The <volume-method> argument must be one of the following: CUBIC ENCLOSING_VOXEL TRILINEAR The <surface-method> argument must be one of the following: ADAP_BARY_AREA BARYCENTRIC Best, Jenn Jennifer Elam, Ph.D. Outreach Coordinator, Human Connectome Project Washington University School of Medicine Department of Anatomy and Neurobiology, Box 8108 660 South Euclid Avenue St. Louis, MO 63110 <tel:314-362-9387> 314-362-9387 <mailto:el...@pcg.wustl.edu> el...@pcg.wustl.edu <http://www.humanconnectome.org> www.humanconnectome.org From: hcp-users-boun...@humanconnectome.org [mailto:hcp-users-boun...@humanconnectome.org] On Behalf Of ? Sent: Thursday, October 29, 2015 3:15 AM To: hcp-users Subject: [HCP-Users] downsample hi, I have a question about downsample the fmri grayordinate data. 30k vertices means too many for me, I wander if I can find the downsampled data from the database, if not, what should I do to downsample using my own computer. Thank you. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
