Hi all.
Say you are interested in (hypothesis generated a priori of course :)) testing
only one major pathway using TBSS. Is it then legal to limit your testing via
randomize to that one major pathway (i.e. by masking the skeleton
appropriately) - somewhat like small volume correction in fMRI? The quesion
crops up because of course your volume of interest is in fact larger than the
derived skeleton (whatever this does to the test statistics - what volume is
one actually correcting for? ...). If legal (but also if not), it would then be nice
to see which individual voxel actually contributed to the masked skeleton,
somewhat of a back transform of the skeleton's distance map.
Regards
Stefan
|