Dear SPMers,

I am currently working on a VBR (voxel-based-relaxometry) study, looking for regions with significant differences between patient and control groups.  I am also interested in looking at global gray and white matter T2 values, however I am not sure how to go about doing this.  Any suggestions would be greatly appreciated.  Would the images have to be segmented into gray and white matter and then summed?

Thanks!

J. Hendry