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Related Experiment Video

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Microelectrode Guided Implantation of Electrodes into the Subthalamic Nucleus of Rats for Long-term Deep Brain Stimulation
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Anatomical targeting for electrode localization in subthalamic nucleus deep brain stimulation: A comparative study.

Thomas Tonroe1,2, Hugh McDermott1,3,4, Patrick Pearce1,5

  • 1Bionics Institute, East Melbourne, Victoria, Australia.

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
|June 8, 2023
PubMed
Summary

Accurate deep brain stimulation (DBS) electrode targeting is crucial for Parkinson's disease treatment. This study compared four targeting methods, finding significant differences in accuracy, though all showed variability.

Keywords:
Parkinson's diseaseanatomical targetingautomationdeep brain stimulationelectrode localizationneuroimagingsubthalamic nucleus

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Area of Science:

  • Neurosurgery
  • Neurology
  • Medical Imaging

Background:

  • Accurate electrode placement is critical for effective deep brain stimulation (DBS) in Parkinson's disease.
  • Variability in anatomical targeting methods can impact patient outcomes and clinical trial development.

Purpose of the Study:

  • To compare the accuracy of four distinct methods for defining anatomical targets for subthalamic nucleus DBS in Parkinson's disease patients.
  • To assess the variability and discordance among different targeting techniques.

Main Methods:

  • Compared direct visualization, red nucleus-based indirect, mid-commissural point-based indirect, and automated template-based targeting methods.
  • Analyzed electrode placement error (Euclidean distance from target to electrode) in 226 hemispheres from 113 patients.
  • Utilized Kruskal-Wallis H-test and Wilcoxon signed-rank tests for statistical comparison.

Main Results:

  • Significant differences in median electrode placement error were observed across the four methods (p < .001).
  • Direct visualization showed statistically significant differences in accuracy compared to red nucleus-based and automated template-based methods (p < .001).
  • Interquartile ranges of placement error differences spanned 1.18-1.56 mm, indicating discordance.

Conclusions:

  • While all methods exhibited discordance in accuracy, their technical differences may favor specific clinical or research applications.
  • The choice of targeting method should consider the intended application due to inherent variability in accuracy.