My guess is that due to tumor the surfaces generated by BrainSuite have too many faces or vertices. This is causing slowing down of the processes. You can try clicking surface registration only checkbox at the beginning of svreg sequence if you need only surface labels.
What is the voxel resolution of the MRIs? As long as it is around 1mm it should not matter too much.
- This reply was modified 7 years, 1 month ago by Anand Joshi. Reason: edits