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Figure 4. This is thep:q diagram for the internal capsule (IC) of a hydrocephalus patient. Regions of interest (ROIs) have been selected on the IC bilaterally at the level of the foramen of Monro. The same ROIs have been selected in a control subject. ROI location is shown in the insets (patient, above; control, below). The p:q diagram demonstrates an increased dispersion (disorganization) of the white matter tracts of the IC in the hydrocephalus patient as compared with the control.