arXiv: cs.AI preprintsInternational11 November 2026
Region-Wise Logit Fusion and Utility-Gated Refinement for Brain Metastasis Segmentation
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arXiv:2611.13884v1 Announce Type: cross Abstract: BraTS-METS 2026 Task 1 evaluates segmentation of brain metastases and postoperative resection cavities on heterogeneous multiparametric MRI, requiring detection of small enhancing foci while preserving the geometry and hierarchy of enhancing tumor (ET), tumor core (TC), whole tumor (WT), and resection cavity (RC). We present COMPASS-METS (Component-Aware Multi-Trainer Probability Assembly with Structured Segmentation), which combines three five-fold nnU-Net configurations into aligned regional probability ensembles. A structured-probability anc
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