[STUDY ON RELATIONSHIP BETWEEN DIFFUSION TENSOR IMAGING AND VISUAL EVOKED POTENTIAL IN VISUAL PATHWAY OF...

Area of Science:

• Neuroscience
• Radiology
• Ophthalmology

Background:

• Neuromyelitis optica (NMO) is a demyelinating disease affecting the central nervous system.
• Visual evoked potential (VEP) assesses the integrity of the visual pathway.
• Diffusion tensor imaging (DTI) provides microstructural information about white matter integrity.

Purpose of the Study:

• To investigate the relationship between white matter lesions detected by DTI and VEP P100 wave latency in NMO patients.
• To evaluate DTI's ability to detect subtle pathological changes in the visual pathway of NMO patients.

Main Methods:

• Twenty NMO patients were divided into VEP abnormal and normal groups.
• DTI was used to measure fractional anisotropy (FA) and mean diffusivity (MD) in the optic nerve, tract, and radiation.
• FA, MD, and P100 wave latency were compared between groups and correlated.

Main Results:

• NMO patients with abnormal VEP showed significantly decreased FA and increased MD values compared to those with normal VEP and controls.
• No significant differences in FA and MD were found between NMO patients with normal VEP and healthy controls.
• FA values negatively correlated with P100 latency, while MD values positively correlated with P100 latency in NMO patients.

Conclusions:

• DTI can detect subclinical white matter abnormalities in the visual pathway of NMO patients.
• There is a significant correlation between DTI metrics and VEP P100 wave latency in NMO.
• Combining DTI and VEP offers a more comprehensive assessment of NMO condition and prognosis.