[caret-users] A scatterbrain issue -- with apologies to the resident punmaster :)

[Jay Hegdé]

Hi,
    I'm using Caret 5 to visualize SPM5 statistical maps (in NIfTI 
format and MNI space) on PALS surfaces using your SPM2 template and 
multifiducial mapping.

    It works great, except that some of the ROIs that are contiguous in 
the original map (where the usual requirement was that all the voxels of 
a given ROI be contiguous) appear highly scattered and non-contiguous on 
the PALS surface.

    Checking the Interpolate box in the Display Control window helps, 
but not much.  (Besides, I'm not at all confident that interpolating is 
the right thing to do in my case.)  The problem occurs for all PALS 
surfaces I've tried (flat, fiducial, inflated or very inflated) and 
regardless of whether a given ROI is in a deep sulcus or on a gyrus (as 
determined by hacking the original map).  So I don't think this is an 
artifact of surface inflation per se, or even of the size of the ROI.

    Could you please give me a sense for why this happens and what if 
anything can be done to fix this?

    Thank you very much.
    Jay Hegdé
    University of Minnesota