Dear @ULFEnCMICCAI2025Participants, Thank you for your continued engagement in the ULF-EnC Challenge! We would like to clarify that the validation phase is intended as a hold-out evaluation set rather than for tracking training convergence. Teams are invited to submit their predicted validation outputs, and we will validate and return the quantitative results. This will allow you to determine which model performs best for your final test submission. 📊 Evaluation Metrics: Metrics will be computed on the entire image volume. However, we are planning to exclude unwanted black background regions to ensure more meaningful evaluation. If this cropping step is finalized, we will update the evaluation script on GitHub and notify all teams accordingly. If you have any questions, feel free to post them here or contact the organizing team directly. Best regards, ULF-EnC Organizing Team