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Striking differences
are found, even among normal human subjects, in the gyral patterns of the cerebral cortex.
Tensor maps can be used to visualize these complex patterns of
anatomical variation.
In these maps (below), color distinguishes
regions of high variability (pink colors) from areas of low variability
(blue). Rectangular glyphs indicate the principal directions of variation -
they are most elongated along directions where there is greatest anatomic
variation across subjects. Each glyph represents the covariance tensor of
the vector fields that map individual subjects onto their
group average
anatomic representation.
The maps are based on a group of
40 normal subjects. The resulting information can
be leveraged to distinguish normal from abnormal anatomical
variants using random tensor field algorithms.
[More about Tensor Maps]
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