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EEG–MRI Co-registration and Sensor Labeling Using a 3D Laser Scanner

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Abstract

This paper deals with the co-registration of an MRI scan with EEG sensors. We set out to evaluate the effectiveness of a 3D handheld laser scanner, a device that is not widely used for co-registration, applying a semi-automatic procedure that also labels EEG sensors. The scanner acquired the sensors’ positions and the face shape, and the scalp mesh was obtained from the MRI scan. A pre-alignment step, using the position of three fiducial landmarks, provided an initial value for co-registration, and the sensors were automatically labeled. Co-registration was then performed using an iterative closest point algorithm applied to the face shape. The procedure was conducted on five subjects with two scans of EEG sensors and one MRI scan each. The mean time for the digitization of the 64 sensors and three landmarks was 53 s. The average scanning time for the face shape was 2 min 6 s for an average number of 5,263 points. The mean residual error of the sensors co-registration was 2.11 mm. These results suggest that the laser scanner associated with an efficient co-registration and sensor labeling algorithm is sufficiently accurate, fast and user-friendly for longitudinal and retrospective brain sources imaging studies.

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Acknowledgments

This study was supported by the French Ministry of Health (PHRC 17-05, 2009). The authors gratefully acknowledge the participation of the healthy subjects involved in this study. The authors also thank Prof. M. Braun and J. Felblinger (IADI Laboratory, INSERM U947) for the MRI data acquisition and review.

Author information

Authors and Affiliations

  1. Centre de Recherche en Automatique de Nancy (CRAN), Nancy-Université, CNRS, Vandoeuvre, France

    L. Koessler, H. Vespignani & L. Maillard

  2. Service de Neurologie, Centre Hospitalier Universitaire de Nancy, Nancy, France

    L. Koessler, H. Vespignani & L. Maillard

  3. Nancy-Université, IUT, rue de l’Université, 88100, Saint-Dié, France

    T. Cecchin & O. Caspary

  4. Laboratoire Imagerie Adaptative Diagnostique et Interventionnelle (IADI), Nancy-Université, INSERM, Vandoeuvre, France

    A. Benhadid

  5. Centre Hospitalier Universitaire de Nancy, Vandoeuvre, France

    A. Benhadid

  6. Faculté de Médecine, Nancy-Université, Vandoeuvre, France

    H. Vespignani

Authors
  1. L. Koessler
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  2. T. Cecchin
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  3. O. Caspary
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  4. A. Benhadid
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  5. H. Vespignani
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  6. L. Maillard
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Corresponding author

Correspondence to T. Cecchin.

Additional information

Associate Editor Ioannis A. Kakadiaris oversaw the review of this article.

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Koessler, L., Cecchin, T., Caspary, O. et al. EEG–MRI Co-registration and Sensor Labeling Using a 3D Laser Scanner. Ann Biomed Eng 39, 983–995 (2011). https://doi.org/10.1007/s10439-010-0230-0

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  • DOI: https://doi.org/10.1007/s10439-010-0230-0

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