Diffusion tensor imaging in hydrocephalus: initial experience

Area of Science:

• Neuroimaging
• Medical Physics
• Radiology

Background:

• Hydrocephalus presents with increased intracranial pressure and ventricular enlargement.
• White matter tract integrity is crucial for neurological function.
• Understanding white matter changes in hydrocephalus is vital for treatment assessment.

Purpose of the Study:

• To investigate white matter diffusion characteristics in hydrocephalus patients using DTI.
• To compare DTI findings before and after surgical intervention for hydrocephalus.
• To evaluate DTI's ability to detect white matter compression in hydrocephalus.

Main Methods:

• Diffusion tensor imaging (DTI) protocol applied to 7 hydrocephalus patients and 8 age-matched controls.
• DTI acquired before and after surgical treatment (shunt placement/revision or ventriculostomy).
• Analysis focused on fractional anisotropy (FA) and diffusion parameters in key white matter tracts.

Main Results:

• Pre-surgery DTI showed increased diffusion parallel and decreased perpendicular to fibers in corona radiata, increasing FA (+28%).
• Post-surgery, FA values in most patients normalized towards control levels.
• Corpus callosum FA was reduced in hydrocephalus patients pre-surgery, with no significant post-surgery change.

Conclusions:

• DTI effectively distinguishes white matter compression changes in hydrocephalus patients pre- and post-surgery.
• DTI findings suggest white matter compression is a key factor in acute hydrocephalus.
• DTI serves as a valuable tool for assessing surgical outcomes in hydrocephalus.