Thanks Stijn! Is there a way to check the ExploreDTI code for KA and find out about it that way? That would make things much easier! :)
Also, in order to find avg(K), K1, K2, and K3, I can use the kurtosis tensor exported from ExploreDTI (Plugins -> Export stuff to *.nii files), right?
Thanks and I'll report back as soon as I have an answer!