YSL, Try mapping both ways: AFM and MFM. The AFM will give you a T-value, based on the enclosing/interpolated voxel. The MFM will give you a mean T-value, based on where your volume intersected each of the 12 PALS hems.
By column here, I think you mean node. The surface is made up of nodes. Nodes are enclosed by voxels -- typically several nodes are enclosed within a given fMRI voxel. Donna On 04/09/2009 10:22 AM, Yune S. Lee wrote: > Many thanks for the help, Donna, but here are my two more dumb questions. > I'm trying to project a group-T map generated by SPM onto the > Human.PALS_B12.BOTH.TEMPLATE-for-fMRI-MAPPING.73730 file. > Is it the case of multi-fiducial mapping? Also, once the SPM T image > is project on to the Human.PALS... template, does each column contain > T-value > in each voxel? Not sure how column is different from the basic unit, > voxel, in caret. > Sorry to bug you by casting dumb questions, but again your help would > be appreciated. > > Thanks, > YSL > > > > > Donna Dierker wrote: >> Hi YSL, >> >> Reading through 1.22 Metric files in the September 2006 tutorial will >> give you an idea of how average area is useful when multi-fiducial mapping. >> >> There is a tag-column-threshold pos/neg value for each column in the >> metric/surface_shape file format. If you select column threshold, the >> threshold will be set to whatever is stored in those fields (0.0 by >> default). >> >> Donna >> >> On 04/09/2009 09:31 AM, Yune S. Lee wrote: >> >>> Dear caret users, >>> >>> I'm wondering what are the differences among column, average area, and >>> user for the threshold adjustment of metric settings. >>> I'm hoping to see the area whose t-value is 5.4 in my data, so I guess >>> I set it to user and type 5.4 in the pos. >>> But, it would be great to know what column and average area are about. >>> Any help would be appreciated. >>> >>> Thanks, >>> YSL >>> >>> >>> >>> _______________________________________________ >>> caret-users mailing list >>> caret-users@brainvis.wustl.edu >>> http://brainvis.wustl.edu/mailman/listinfo/caret-users >>> >>> >> >> _______________________________________________ >> caret-users mailing list >> caret-users@brainvis.wustl.edu >> http://brainvis.wustl.edu/mailman/listinfo/caret-users >> > > ------------------------------------------------------------------------ > > _______________________________________________ > caret-users mailing list > caret-users@brainvis.wustl.edu > http://brainvis.wustl.edu/mailman/listinfo/caret-users > _______________________________________________ caret-users mailing list caret-users@brainvis.wustl.edu http://brainvis.wustl.edu/mailman/listinfo/caret-users
