Pseudo DICE and traning/testing losses not improving

[CYH16]

Hi, thank you for this wonderful model. It helped me a lot with several projects.

However, in one of my recent projects where I tried to implement nnUNet to segment ureteral stone from noncontrast abdominal CT, the dice was constantly 0.0 and the traning/testing losses were oscillating. I don't think it was because small segments compared with the whole images since nnUNet performed well in another project where the segments were also small.

Are there any other possibilities that I can check on or improve? Or if I need to provide some relevant information, please let me know.

Again, thanks a lot for this wonderful model.