TotalSeg Ribs (Dataset295) — 27-class CT segmentation

TotalSegmentator v2 part-5 submodel. 26 fg classes: rib_left_1..12, rib_right_1..12, sternum, costal_cartilages. Apache-2.0 weights. Patch [128,128,128] @ [1.5, 1.5, 1.5] mm iso, cubic B-spline resample, NibabelIOWithReorient, CTNormalization. Same PlainConvUNet runtime as cardiac/organs — only weights, plan stats, and palette differ.