Optic radiation injury following traumatic epidural hematoma: Diffusion tensor imaging study

Area of Science:

• Neuroimaging
• Neurology
• Traumatology

Background:

• Optic radiation (OR) injury is not well understood in traumatic brain injury (TBI) patients.
• Traumatic epidural hematoma (EDH) can cause significant neurological deficits.
• Visual field defects are a potential consequence of TBI affecting visual pathways.

Purpose of the Study:

• To investigate the utility of diffusion tensor imaging (DTI) in detecting optic radiation (OR) injury following traumatic brain injury (TBI).
• To report a case of OR injury identified by DTI in a patient with traumatic epidural hematoma (EDH).
• To assess the potential of DTI as a diagnostic tool for visual pathway damage in TBI.

Main Methods:

• A case study involving a 38-year-old male patient with TBI and traumatic EDH.
• Brain CT for EDH diagnosis and conventional MRI for initial OR assessment.
• Diffusion tensor imaging (DTI) with fiber tractography to evaluate the optic radiation (OR).

Main Results:

• The patient presented with right bilateral homonymous hemianopsia, confirmed by visual field testing.
• Conventional MRI did not reveal visible lesions in the left OR, and fiber tractography failed.
• DTI identified severe injury in the midportion of the left OR, between the lateral geniculate body and occipital pole.

Conclusions:

• Diffusion tensor imaging (DTI) is a valuable technique for detecting optic radiation (OR) injury in patients with traumatic brain injury (TBI).
• DTI should be considered alongside conventional MRI for patients experiencing visual field defects post-TBI.
• Early detection of OR injury using DTI may aid in understanding and managing visual impairments after TBI.