my question is regarding a cleaner way to combine multiple transforms where the latter transforms are optimized over the resampled image.
So what I want to do smth like this:
resampled = T1(fixed,moving)
final = T2(fixed, resampled)
Im curretnly using itk-elastix for python, for which I can just stack 2 registration workflows after each other too achieve what I described above.
However, now I would like to combine these two registrations (T1,T2) into a single one that I can apply directly to the moving image with e.g. transformix to resample masks within the moving image.
When I just combine they with either “Compose” or “Add” in the TX parameter files the results differ noticeably from doing the transformations with 2 separate transforms T1,T2.
Having one transformation rather than too would be very helpful to calculate the inverse or transformation fields.
I hope my made my comment clear and I would be very grateful for any help with this!