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Reliability of atlas-derived coordinates in deep brain stimulation
J Schlaier1, P Schoedel, M Lange
1Department of Neurosurgery, University of Regensburg, Germany. juergen.schlaier@klinik.uni-regensburg.de
Acta Neurochirurgica
|September 1, 2005
Summary
Direct MRI targeting for deep brain stimulation is more reliable than atlas-based methods for defining subthalamic nucleus (STN) locations. This study found significant differences in coordinates, highlighting MRI
Area of Science:
- Neurosurgery
- Medical Imaging
- Stereotactic Surgery
Background:
- Deep brain stimulation (DBS) target localization remains debated.
- Atlas-derived targeting accuracy compared to direct MRI visualization is unclear.
Purpose of the Study:
- To evaluate the reliability of atlas-derived targeting versus direct MRI targeting for the subthalamic nucleus (STN).
Main Methods:
- Compared STN target coordinates derived from direct MRI (axial/coronal T2WI) with atlas-based methods in 14 volunteers (28 targets).
- Investigated direct targeting on axial and coronal T2-weighted images and indirect targeting using atlas plates and AC-PC reference points.
Main Results:
- Atlas-derived targets showed statistically significant differences in x, y, and z coordinates compared to direct MRI targeting (p < 0.001).
- Differences up to 6.21 mm were observed, with atlas targets being more lateral and superior.
- No significant difference was found between axial and coronal MRI-derived targets.
Conclusions:
- Direct MRI targeting offers superior reliability for STN localization in deep brain stimulation.
- Atlas data is less precise due to individual anatomical variations and image distortions.
- For targets not visible on MRI, stereotactic atlases and intra-operative recordings are necessary.