Figure 1.

Three-dimensional scatter plot of the eigenvalues of the Hessian matrix. The voxels belonging to linear structures are those for which |λ2| and |λ3| are negative while |λ1| is close to zero, resulting in the cluster in the bottom part of the plot.

Zivadinov et al. BMC Neurology 2011 11:128   doi:10.1186/1471-2377-11-128
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