On 10/08/2009 11:01 AM, soha saleh wrote: > Hi Donna and caret users: > > I need to map the functional MRI data onto reconstructed surface of > our subject's MRI data. Can we do this using caret? If yes please give > me some help with that. Yes:
If the surface is already in Caret .coord/.topo form, then you can go straight here: http://brainvis.wustl.edu/wiki/index.php/Caret:Operations/MapVolumeToSurface If the surface is in Freesurfer format, you can import it using the GUI using File: Open Data File: FreeSurfer Binary Surface File; however, you'll probably find it easier to use one of the scripts out there for importing Freesurfer surfaces. Here is one such script: http://brainmap.wustl.edu/pub/donna/FREESURFER/SCRIPTS/2009_09/freesurfer2caret.Ver2a.preborder.mni2wustl.sh login pub password download But certain steps are study-specific (e.g., the appropriate affine transforms to apply to the surface, which depends on input). > > I guess this is doable using FreeSurfer, but I never used FreeSurfer > and I am a new Caret user, if it is doable in both, which is better > and easier?! I'm certain Freesurfer can map functional data onto Freesurfer surfaces, but I don't know how to do it. Nor do I know which is better. For mapping in Caret, we typically use the midthickness surface as the mapping substrate. The most popular mapping algorithms are enclosing voxel and interpolated voxel. The web page above explains the algorithms. > > Thank you! > > Regards, > Soha _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
