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Proceedings Paper

Feasibility of tracked electrodes for use in epilepsy surgery
Author(s): David Holmes III; Benjamin Brinkmann; Dennis Hanson; Gregory Worrell; Richard Robb; Leslie Holton
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Paper Abstract

Subdural electrode recording is commonly used to evaluate intractable epilepsy. In order to accurately record electrical activity responsible for seizure, electrodes must be positioned precisely near targets of interest, often indicated preoperatively through imaging studies. To achieve accurate placement, a large craniotomy is used to expose the brain surface. With the intent of limiting the size and improving the location of craniotomy for electrode placement, we examined magnetic tracking for localization of electrode strips. Commercially available electrode strips were attached to specialized magnetic tracking sensors developed by Medtronic plc. In a rigid phantom we evaluated the strips to determine the accuracy of electrode placement on targets. We further conducted an animal study to evaluate the impact of magnetic field interference during data collection. The measured distance between the physical fiducial and lead coil of the electrode strip was 1.32 ± 1.03mm in the phantom experiments. The tracking system induces a very strong signal in the electrodes in the Very Low Frequency, an International Telecommunication Union (ITU) designated frequency band, from 3 kHz to 30 kHz. The results of the animal experiment demonstrated both tracking feasibility and data collection.

Paper Details

Date Published: 18 March 2016
PDF: 8 pages
Proc. SPIE 9786, Medical Imaging 2016: Image-Guided Procedures, Robotic Interventions, and Modeling, 97862M (18 March 2016); doi: 10.1117/12.2217859
Show Author Affiliations
David Holmes III, Mayo Clinic (United States)
Benjamin Brinkmann, Mayo Clinic (United States)
Dennis Hanson, Mayo Clinic (United States)
Gregory Worrell, Mayo Clinic (United States)
Richard Robb, Mayo Clinic (United States)
Leslie Holton, Medtronic plc (United States)

Published in SPIE Proceedings Vol. 9786:
Medical Imaging 2016: Image-Guided Procedures, Robotic Interventions, and Modeling
Robert J. Webster III; Ziv R. Yaniv, Editor(s)

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