Comparison of different targeting methods for subthalamic nucleus deep brain stimulation.

Area of Science:

• Neurosurgery
• Neurology
• Medical Imaging

Background:

• Deep brain stimulation (DBS) is a key treatment for Parkinson's disease, targeting the subthalamic nucleus (STN).
• Accurate STN targeting is crucial for optimizing DBS efficacy and minimizing side effects.
• Various targeting methods exist, but their precision in STN DBS surgery requires rigorous evaluation.

Purpose of the Study:

• To retrospectively assess the accuracy and precision of six different targeting methods for STN DBS.
• To compare the performance of methods relying solely on anatomical data versus those integrating functional information.
• To identify the most reliable targeting approach for STN DBS surgery.

Main Methods:

• A retrospective study of 10 patients undergoing bilateral STN DBS.
• Utilized a visualization and navigation system with normalized functional and anatomical data.
• Compared planned target locations from six methods against a 'gold standard' derived from surgical planning and intra-operative confirmation.

Main Results:

• Targeting methods evaluated included T2-weighted MRI, brain atlas, T1/T2 maps, electrophysiological database, and prior patient targets.
• The combined functional and anatomical data approach achieved the highest accuracy, with a mean target localization error of 1.7 +/- 0.8 mm.
• Other methods showed mean errors ranging from 2.5 +/- 1.0 mm to 3.2 +/- 1.1 mm.

Conclusions:

• Integrating functional and anatomical data significantly enhances the accuracy and precision of STN DBS targeting.
• This combined approach provides a reliable method for determining optimal surgical target positions in STN DBS.
• Improved targeting accuracy is expected to lead to better surgical outcomes for Parkinson's disease patients treated with DBS.