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. Author manuscript; available in PMC: 2016 Jan 15.
Published in final edited form as: Magn Reson Imaging. 2015 Oct 23;34(1):8–17. doi: 10.1016/j.mri.2015.10.003

Figure 7. Functional correlation tensors and linear index of their shape.

Figure 7

Linear index is defined to be the difference between the two largest eigenvalues divided by the average of the three eivenvalues. Left and right two columns are axial views of the insets in Figure 1 and 3 (3rd row) respectively. The linear index is higher for cigar-shaped tensors (red arrow), which are typically along white matter tracts, than pancake-shaped tensors (blue arrow) or spherical tensors (green arrow), which typically lie at the gray-white matter boundary or inside the gray matter region.