Is your feature request related to a problem? Please describe.
Followup discussion of #896 .
Currently, we don't have a flexible segmentation pipeline that can support different backbones and pretrained weights.
I think it would be very useful to provide such networks, at least for the UNet implementation.
Actually, we already have some similar prototype in the tutorial:
https://github.com/Project-MONAI/tutorials/blob/main/kaggle/RANZCR/4th_place_solution/models/seg_model.py
I think we can start from integrating this implementation.
@wyli @yiheng-wang-nv What do you think?