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Automated Atlas Fitting for Deep Brain Stimulation Surgery Based on Microelectrode Neuronal Recordings

  • Eduard Bakštein
  • Tomáš Sieger
  • Daniel Novák
  • Filip Růžička
  • Robert Jech
Conference paper
Part of the IFMBE Proceedings book series (IFMBE, volume 68/3)

Abstract

Introduction: The deep brain stimulation (DBS) is a treatment technique for late-stage Parkinson’s disease (PD), based on chronic electrical stimulation of neural tissue through implanted electrodes. To achieve high level of symptom suppression with low side effects, precise electrode placement is necessary, although difficult due to small size of the target nucleus and various sources of inaccuracy, especially brain shift and electrode bending. To increase accuracy of electrode placement, electrophysiological recording using several parallel microelectrodes (MER) is used intraoperatively in most centers. Location of the target nucleus is identified from manual expert evaluation of characteristic neuronal activity. Existing studies have presented several models to classify individual recordings or trajectories automatically. In this study, we extend this approach by fitting a 3D anatomical atlas to the recorded electrophysiological activity, thus adding topological information. Methods: We developed a probabilistic model of neuronal activity in the vicinity the subthalamic nucleus (STN), based on normalized signal energy. The model is used to find a maximum-likelihood transformation of an anatomical surface-based atlas to the recorded activity. The resulting atlas fit is compared to atlas position estimated from pre-operative MRI scans. Accuracy of STN classification is then evaluated in a leave-one-subject-out scenario using expert MER annotation. Results: In an evaluation on a set of 27 multi-electrode trajectories from 15 PD patients, the proposed method showed higher accuracy in STN-nonSTN classification (88.1%) compared to the reference methods (78.7%) with an even more pronounced advantage in sensitivity (69.0% vs 44.6%). Conclusion: The proposed method allows electrophysiology-based refinement of atlas position of the STN and represents a promising direction in refining accuracy of MER localization in clinical DBS setting, as well as in research of DBS mechanisms.

Keywords

Deep brain stimulation Anatomical atlas fitting Microelectrode recordings 

Notes

Acknowledgements

The work presented in this paper was supported by the Czech Science Foundation (GACR), under grant no. 16-13323S and by the Ministry of Education Youth and Sports, under NPU I program Nr. LO1611.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Eduard Bakštein
    • 1
    • 2
  • Tomáš Sieger
    • 1
    • 3
  • Daniel Novák
    • 1
  • Filip Růžička
    • 3
  • Robert Jech
    • 3
  1. 1.Faculty of Electrical Engineering, Department of CyberneticsCzech Technical University in PraguePragueCzech Republic
  2. 2.National Institute of Mental HealthKlecanyCzech Republic
  3. 3.First Faculty of Medicine, Department of NeurologyCenter of Clinical Neuroscience, Charles University, and General University HospitalPragueCzech Republic

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