Table 2 Manual intra- and inter-physician segmentation results (min, max, mean μ and standard deviation σ) for three neurosurgeons – X, Y and Z – for twelve glioblastoma multiforme (GBM) data sets. The first column represents the intra-physician segmentation result: within a time distance of two weeks Physician X segmented the twelve GBMs slice-by-slice twice. The second and third columns present the inter-physician segmentation results, whereby the manual slice-by-slice segmentations form Physician Y and Physician Z have been compared with the first manual segmentation of Physician X

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