Figure 6. Connection probability maps in the two hemispheres for three exemplificative cases.

(Meningioma, M3; Low-Grade Glioma, LGG4; High-Grade Glioma, HGG3). The probability maps, in which each voxel value corresponds to the number of streamlines that enter the voxel divided by the total number of streamlines in the input, are overlaid onto coronal and axial views of the b0 brain volume. Results showed different degrees of severity in the tumor-induced alterations of white matter tracts, as compared to the contralateral architecture. On the left and right sides, connectivity maps obtained by deterministic tractography confirm that the deterministic algorithm tracked all the important connections shown by the probabilistic analysis.