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Fig. 7 | BMC Medical Imaging

Fig. 7

From: Semi-automated brain tumor segmentation on multi-parametric MRI using regularized non-negative matrix factorization

Fig. 7

Example of a bad segmentation result due to suboptimal voxel selection. A close-up of a GBM lesion on an axial T1C slice (a). The manually segmented necrotic region is shown in yellow (b), the selected necrotic voxel is marked in red. Segmentation of the active tumor region (c) and necrotic region (d) on several slices, blue indicates NMF segmentation, green indicates manual segmentation and cyan indicates overlap

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