Accuracy of robot-assisted versus optical frameless navigated stereoelectroencephalography electrode placement in children

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In Brief

We looked at the accuracy of depth electrode placement using a standard navigation system and a robot-assisted technique. It is important because there was a significant difference in accuracy between the two methods.

ABBREVIATIONS CTA = CT angiography; IQR = interquartile range; MEG = magnetoencephalography; ON = optical frameless neuronavigation; RA = robot-assisted; SEEG = stereoelectroencephalography.

Article Information

Correspondence Julia D. Sharma: Valley Children’s Hospital, Madera, CA. sharma.julia@gmail.com.

INCLUDE WHEN CITING Published online January 4, 2019; DOI: 10.3171/2018.10.PEDS18227.

Disclosures Dr. Sharma reports accepting funding from Renishaw to help attend a conference to present her results, which was discussed and arranged only after the data were collected, the results analyzed, and the work presented at the 2017 SBNS meeting.

© AANS, except where prohibited by US copyright law.

Headings

Figures

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    Intraoperative photograph of RA electrode implantation. Figure is available in color online only.

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    Three-dimensional map of implanted electrodes.

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    Postoperative CT scan fused to preoperative images. The planned target point is marked by the star and stereotactic coordinates were taken from this point. The stereotactic coordinates of the implanted electrode tip were taken from the center of the white outline of the electrode. The Euclidean distance (represented by “d”) was calculated using the formula indicated. Figure is available in color online only.

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    Box-and-whisker plots representing localization errors at the cortical surface and at the target for RA (Robot) and ON (Frameless) implantations. The difference between RA and ON was highly significant.

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