Human subthalamic nucleus: evaluation with high-resolution MR imaging at 3.0 T.

Area of Science:

• Neuroimaging
• Radiology
• Neuroanatomy

Background:

• The subthalamic nucleus (STN) is crucial for motor control.
• Accurate STN visualization is essential for neurological assessments and interventions.
• High-field MRI (3.0 T) offers enhanced anatomical detail.

Purpose of the Study:

• To compare the visibility of the normal subthalamic nucleus (STN) using fast spin-echo T2-weighted (FSE T2-W) and fast short inversion time inversion-recovery (FSTIR) MRI sequences at 3.0 T.
• To evaluate age-related changes in the STN's size and position.

Main Methods:

• High-resolution FSE T2-W and FSTIR images were acquired from 24 healthy subjects.
• STN margin visibility, signal intensity differences, and contrast-to-noise ratios were assessed.
• STN position, length, and height were measured to evaluate age-related changes.

Main Results:

• FSTIR sequences provided significantly better visualization of the STN's lower margin.
• FSE T2-W sequences offered superior visibility for other STN margins.
• Increased signal intensity difference between STN and substantia nigra was observed with FSTIR.
• STN lateral border distance from the midline increased with age on FSE T2-W images.

Conclusions:

• Combining FSE T2-W and FSTIR imaging at 3.0 T enhances STN identification.
• Age-related positional shifts in the STN necessitate consideration for deep brain stimulation (DBS) target planning.