Figure 2
From: GBM Volumetry using the 3D Slicer Medical Image Computing Platform

Comparison of glioblastoma multiforme (GBM) segmentation results on an axial slice: semi-automatic segmentation under Slicer (green, left image) and pure manual segmentation (blue, middle image).
Moreover, a fused visualization of the 3D masks of the manual and the Slicer segmentation is presented (rightmost image).