P. Sree Lakshmi and Arpita Gupta 2026. PVRSAP-Net: Probabilistic Voxel Refinement and Spatial Attention Pyramid Learning for Three-Dimensional Multiregion Brain Tumor Segmentation. International Journal of Computer Information Systems and Industrial Management Applications. 18, 11s (Jul. 2026), 1035–1070. DOI:https://doi.org/10.70917/ijcisim-2026-3831.