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Updated: Mar 10, 2026
DTI of the Visual Pathway - White Matter Tracts and Cerebral Lesions
Published on: August 26, 2014
Homonymous Visual Field Loss without Structural Lesion on Magnetic Resonance Imaging: Documented with Positron
Tae-Ho Yang1, Sun-Young Oh2, Kichang Kwak3
1Department of Neurology, Chonbuk National University College of Medicine, and Research Institute of Clinical Medicine Chonbuk National University, Jeonju Korea.
Abstract:
The authors describe a 35-year-old man suffering from homonymous hemianopia after head trauma 4 years before but with negative magnetic resonance imaging (MRI) findings. Brain fluorine-18 fluorodeoxyglucose positron emission tomography (18FDG-PET) showed hypometabolism at the unilateral occipital lobe and crossed cerebellar hemisphere, and diffusion tensor imaging (DTI) revealed that the ipsilateral optic radiations were completely interrupted. The crossed cerebellar diaschisis (CCD) observed in the chronic stage of brain damage was caused by cerebellar suppression of the cerebral blood flow due to an involvement of the corticopontocerebellar tract. PET and DTI provide objective means for determining the relationship of functional deficits to head trauma, even in cases where the injury was sustained years prior to the evaluation.
