|
FIG 2. Case 1, a 23-year-old man.
A and B, T2-weighted images. The patient had a left temporal lobectomy (A). No abnormal signal intensity is seen within the sagittal stratum, which includes optic radiation (B). C, Visual field: Partial visual field defect in the medial sector is seen (group A). D, Color-displayed tensor image: Sagittal strata including the optic radiation are recognized as a green area indicating an anterior to posterior directed tract. Regions of interest for measurement are shown as dotted lines. E, FA image 255 . FA of the left optic radiation shows a slightly lower value as compared with the opposite side (right, 0.499; left, 0.425). F, ADC image 255 . There is no apparent difference between the optic radiations of both sides (right, 5.90 x 10 –4 mm2/s; left, 5.70 x 10–4 mm2/s).
|