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Figure 5–2. Diffusion tensor imaging (DTI) of the corpus callosum.

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Figure 5–2. Diffusion tensor imaging (DTI) of the corpus callosum.The left panel is a partially rotated left-frontal oblique view of a DTI sequence referred to as B0. DTI sequences have a fuzzy appearance to them and in their unprocessed state lack the anatomical clarity of other magnetic resonance imaging sequences. Major brain landmarks can still be identified, which in this view include the cingulated gyrus (A), corpus callosum (B), and fornix (C). However, from the various DTI sequences, fiber tract directionality can be determined as shown in the panel on the right, which depicts the left hemisphere tracts emanating from the entirety of the length of the corpus callosum. This image is from a normal adult control subject; note the fullness of the projecting tracts. DTI convention depicts anterior-to-posterior projecting tracts as green, vertically oriented tracts as blue, and laterally or back-and-forth projecting tracts as warm colors (red-orange). In this figure only the aggregate fiber tracts of the corpus callosum and fornix are shown, but all regions of the brain and their white matter connections can be shown with DTI.

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