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Figure 5–10. Diffusion tensor imaging (DTI) of the corpus callosum.

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Figure 5–10. Diffusion tensor imaging (DTI) of the corpus callosum.The left images show DTI tractography (upper left) of the corpus callosum superimposed on the T1 image of a traumatic brain injury patient who suffered a severe injury. Note, in comparison with the age-matched individual on the right without a history of brain injury, that the tractography demonstrates a significant reduction in the number of aggregate white matter tracts that can be identified coursing across the corpus callosum and projecting into the left hemisphere. The lower images show the midsagittal plane of the DTI color maps. The arrow in the lower left panel points to the corpus callosum highlighted in red, because DTI is sensitive to the directionality of the fiber tracts; red denotes lateral back-and-forth direction, whereas green reflects anterior-posterior and blue indicates vertical. The arrow in the upper left points to a corpus callosum tract coming out of the forceps minor projection system and is shown here to give the reader orientation for interpreting Figure 5–11.

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