[MINC-users] averaging displacement -> black slices

[oliver.gress@medizin.uni-leipzig.de]

Hello,

I'm registering histological slices (minc volumes with z-depth=1) with 
hierarchical non-linear fitting using minctracc. I register each slice 
to its predecessor and successor. I get two minc files for the 
displacement volumes, which I average by mincaverage.

My problem now is that after applying the averaged displacement to the slices 
by mincresample, almost every second slice just contains 'zero'-values, so 
they appear black. The problem seem to be the averaged displacement volumes 
because some of them work and some of them don't. All the displacement 
volumes are non-zero, so I wonder if the averaging can produce values that 
cause problems for the mincresample operation.
Any ideas?

Thanks in advance
Oliver