Image using imagesc with no brain registration, just the tumour. anisotropy = 1 (same as water), D mean 1.5x10^-7, rho = 4

Same plot technique, same location, anisotropy (r factor) = 10

Note different shapes of initial tumour especially.

N.b.  Question needs answering, is the falx cerebri counted as an anatomical boundary in the brain mask. as it should be!