Accuracy of high-density EEG electrode position measurement using an optical scanner compared with the photogrammetry method
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Accuracy of high-density EEG electrode position measurement using an optical scanner compared with the photogrammetry method. / Györfi, Orsolya; Ip, Cheng Teng; Justesen, Anders Bach; Gam-Jensen, Maria Louise; Rømer, Connie; Fabricius, Martin; Pinborg, Lars H.; Beniczky, Sándor.
In: Clinical Neurophysiology Practice, Vol. 7, 2022, p. 135-138.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Accuracy of high-density EEG electrode position measurement using an optical scanner compared with the photogrammetry method
AU - Györfi, Orsolya
AU - Ip, Cheng Teng
AU - Justesen, Anders Bach
AU - Gam-Jensen, Maria Louise
AU - Rømer, Connie
AU - Fabricius, Martin
AU - Pinborg, Lars H.
AU - Beniczky, Sándor
N1 - Publisher Copyright: © 2022 International Federation of Clinical Neurophysiology
PY - 2022
Y1 - 2022
N2 - Objective: To determine the feasibility and accuracy of a handheld optical scanner to measure the three-dimensional (3D) EEG electrode coordinates in a high-density array of 256 electrodes. Methods: We compared the optical scanning with a previously validated method, based on photogrammetry. Electrode coordinates were co-registered with the MRI of the patients, and mean distance error relative to the three-dimensional MRI reconstruction was determined for each patient. We included 60 patients: 30 were measured using the photogrammetry method, and 30 age and gender matched patients were measured with the optical scanner. Results: Using the optical scanner, the mean distance error was 1.78 mm (95% confidence interval: 1.59–1.98 mm) which was significantly lower (p < 0.001) compared with the photogrammetry method (mean distance error: 2.43 mm; 95% confidence interval: 2.28–2.57 mm). The real-time scanning took 5–10 min per patient. Conclusions: The handheld optical scanner is more accurate and feasible, compared to the photogrammetry method. Significance: Measuring EEG electrode positions in high-density array, using the optical scanner is suitable for clinical implementation in EEG source imaging for presurgical evaluation.
AB - Objective: To determine the feasibility and accuracy of a handheld optical scanner to measure the three-dimensional (3D) EEG electrode coordinates in a high-density array of 256 electrodes. Methods: We compared the optical scanning with a previously validated method, based on photogrammetry. Electrode coordinates were co-registered with the MRI of the patients, and mean distance error relative to the three-dimensional MRI reconstruction was determined for each patient. We included 60 patients: 30 were measured using the photogrammetry method, and 30 age and gender matched patients were measured with the optical scanner. Results: Using the optical scanner, the mean distance error was 1.78 mm (95% confidence interval: 1.59–1.98 mm) which was significantly lower (p < 0.001) compared with the photogrammetry method (mean distance error: 2.43 mm; 95% confidence interval: 2.28–2.57 mm). The real-time scanning took 5–10 min per patient. Conclusions: The handheld optical scanner is more accurate and feasible, compared to the photogrammetry method. Significance: Measuring EEG electrode positions in high-density array, using the optical scanner is suitable for clinical implementation in EEG source imaging for presurgical evaluation.
KW - 3D EEG electrode coordinates
KW - High-density EEG
KW - Optical scanner
KW - Photogrammetry
U2 - 10.1016/j.cnp.2022.04.002
DO - 10.1016/j.cnp.2022.04.002
M3 - Journal article
C2 - 35620351
AN - SCOPUS:85130353704
VL - 7
SP - 135
EP - 138
JO - Clinical Neurophysiology Practice
JF - Clinical Neurophysiology Practice
SN - 2467-981X
ER -
ID: 314074596