Please try group normalization

[John1231983]

First place in brats18 used group norm. It is interesting to try it. Looking forward to seeing your result on it. One more thing. Why not use crop size smaller for three dim, for example, 64x64x64 then it will have more augmentation data.?

Update: to reduce preprocessing time in n4, you can try to directly use n4 .exe file from ants and just call it in python. In my experiement, it takes 30 seconds instead of 7 mins using pỵthon build-in

[John1231983]

@tkuanlun350 : Have you try it? Thanks