AI RESEARCH
PGR-Net: Prior-Guided ROI Reasoning Network for Brain Tumor MRI Segmentation
arXiv CS.CV
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ArXi:2603.21626v1 Announce Type: new Brain tumor MRI segmentation is essential for clinical diagnosis and treatment planning, enabling accurate lesion detection and radiotherapy target delineation. However, tumor lesions occupy only a small fraction of the volumetric space, resulting in severe spatial sparsity, while existing segmentation networks often overlook clinically observed spatial priors of tumor occurrence, leading to redundant feature computation over extensive background regions.