Without having an actual GM/WM surface to use as a mapping substrate, any solution will be sub-optimal. If you can get a white surface, then map to it.
Otherwise, here are some ideas: * Use either gaussian or MCWBrainfish as your mapping algorithm, instead of enclosing/interpolated voxel: http://brainvis.wustl.edu/wiki/index.php/Caret:Operations/MapVolumeToSurface#Mapping_Algorithm_Page * Use Surface: Geometry: Expand or shrink surface. How will a reviewer tolerate these options? No guarantees. On Nov 9, 2011, at 9:14 AM, Leon wrote: > Hi, Donna > Thank you very much for the information. I figured out how to register the > paint volume with the anatomical volume used to generate fiducial surface > through an older post and it works now. However, I have another question that > is somewhat related to the previous one. As my cortical parcellation (paint > volume) is derived based on the *gray matter/white matter interface mask*, I > find that if I project the paint volume to the surface, no paint will show on > the surface, as they do not intersect ( I assume that the fiducial surface is > generated based on the surface that is more distant to the > gray-matter/white-matter interface than my paint volume). I then dilated my > cortical parcellation using FSL so that it contains the volume in gray matter > too and projected it again. This time, it worked. However, probably due to > the over dilation, the paint projected onto the fiducial surface looks quite > strange. So, my question is: is there any way that I can change the fiducial > surface ! so that it can be closer/more distant to the GM/WM interface without segmenting it again, so that the fiducial surface will intersect with my cortical parcellation without the need for dilation process? Is there any other solution, in your opinion, will solve this issue? > > Thank you! > Leon > _______________________________________________ > caret-users mailing list > [email protected] > http://brainvis.wustl.edu/mailman/listinfo/caret-users _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
